Alien Vision Exploring the Electromagnetic Spectrum with Imaging Technology, Second Edition
Login /Register Please to see the link | 46.11 MB | English | Author :Richards, Austin A. | 978-0819485359 | 2011 | SPIE Press; 2nd Edition edition
Book Description :
Austin Richards takes readers on a visual tour of the electromagnetic spectrum beyond the range of human sight, using imaging technology as the means to "see" invisible light. Dozens of colorful images and clear, concise descriptions make this an intriguing, accessible technical book. Richards explains the light spectrum, including visible light, and describes the advanced imaging technologies that enable humans to synthesize our own version of "alien" vision at different wavelengths, with applications ranging from fire fighting and law enforcement to botany and medicine. The second edition expands existing content, explores recent areas of research, and provides new illustrations that demonstrate the variability of vision throughout the spectrum.
Category : | Science & Mathematics, Science & Math
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When you use slower shutter speeds, you get much more light hitting the sensor. A: Yes, the 24mm lens is good but not ideal for landscape photography. 1. This lens combines some of the features of the previous two lenses in terms of its range of zoom and its quality. If I try to take a photo at 24mm focal length with both a prime lens and a zoom lens at around the same price, there’s a good chance that the prime will take a better photo. First on our list is the granddaddy of wide angle prime lenses, and it is without a doubt the highest quality glass on this list. View on Amazon. Otherwise you have to use a very slow shutter speed, which can result in stars trailing in the photo as they move across the sky (though this can be desirable sometimes!). It has produced a stunning looking lens with premium quality components that are in accordance with today’s need. That means images will reveal themselves fairly close to what you imagined—that is, of course, if you know what you’re doing. For landscape photographers, the Nikkor 16-35mm f/4G ED VR is one of the best Nikon travel lenses that they can own. Depending on your subject, it can be harder to mix it up and get a lot of unique photos. Those who love to carry lightweight lenses should be aware of one thing that Tamron SP 15-30mm G2 is not that light so if you’re looking for something light then you should pick it wisely, but if weight’s not an issue for you then we’ll say it’s a reasonably priced lens that is sure to impress you with its performance. Nikon introduced this lens in 2007, and still, it’s one of the sharpest lenses out in the market in the category of 14mm. BUY NOW £369.00. This can be great for artistic effect, but bad if you’re photographing a bride on her wedding day. They work. This lens has a lot in common with the first one I listed, the Nikon AF FX NIKKOR 28mm f/2.8D Lens. Sigma has beautifully crafted this lens with 15 elements in 11 groups of optical design that delivers constant peripheral sharpness and brightness. While investing in a wide-angle lens, many photographers get confused that what lenses or focal lengths are ideal for their needs, so we hope this guide will resolve the confusion, and you will find it helpful in choosing the best wide-angle lens for Nikon FX. Just keep in mind the angle will be less wide on a DX than FX. 20mm is one of my favorite focal lengths for architecture, because it’s wide enough to capture a lot of the building and get a small amount of artistic distortion but narrow enough to capture detail. The Nikon AF-S DX 8-15mm Fisheye is a specialty lens that gives a unique wide-angle perspective with the fisheye lens. It was incredible in 2007 when it was released, and the images it makes are still jaw-dropping today. This is probably the most versatile lens on this list. The Nikon AF-P DX Nikkor 10-20mm f/4.5-5.6G VR is an inexpensive, light, compact and fantastic lens to use. Here I would say the wider the better so you can capture as much of the sky as possible. Ideally I'd grab a Nikon 24-70 2.8 but until I save up a little further that's outside of the budget. For aperture, though, the answer is a bit more clean-cut. The old-schoolers will also love a separate ring for the … But at this point in the list, we’re only really seeing lenses with overall excellent performance. While every lens on this list so far has been a prime lens, this one is a zoom. Best APS-C Wide-Angle Zoom Lenses for Nikon Sigma 18-35mm f/1.8 DC HSM Art The Sigma 18-35mm f/1.8 is easily one of the best wide-angle zooms on the market. CHECK PRICE ON AMAZON. Choosing the right wide angle lens for your needs and budget can be hard. Nikon AF-S DX 10-24mm f/3.5-4.5G ED Check the latest price on Amazon. This one is from Sigma Art series, designed for shooting in a variety of situations. When it comes to performance and quality, it surely beats Nikon’s 16-35mm f/4G ED VR and 18-35mm f/3.5-4.5G ED so if you’re looking for an all-in-one deal, then this thing is what you need to complete your camera gear. Sigma 18-300mm F3.5-6.3 DC Macro OS HSM Lens for Nikon. Cameras Gear is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by linking to Amazon.com and other Amazon websites. Nothing worse than ordering a new lens and finding it doesn’t fit your camera! I’m a travel photographer from Paris, France. Even in Canon’s full-frame bodies, pro photographers are using this lens with adapters as I say it’s not easy to leave this beast alone. However, It’s quite expensive at just over $1400. Sigma has built this lens while keeping professional photographers in mind, and it shows. Tamron VC; any; more Focus motor. Nikon has built it with solid premium material and sealed it well to ensure that the dust particles and moisture doesn’t harm the lens in any way. A: An ultra-wide angle lens with a focal length of 14mm or a wide-angle lens between 15mm to 30mm is the best. I’m amazed by some of the results you can get with this lens when you open it up wide, point it at the sky, and hit the shutter. Diagonal fisheye lenses correct for this so the distorted image takes up the whole frame. Such focal length is also much suitable for architectural photography. This is likely a lens for professional photographers. Buying this one incredibly high-quality lens saves you from having to buy a few different, cheaper lenses. It captures stunningly beautiful wide angle images. In low light conditions, one doesn’t have to worry as with f/1.8; this lens can easily handle difficult lightning conditions. Your email address will not be published. If you’re ready to make a serious investment in wide-angle photography, I think this is a truly excellent choice. This is a fairly heavy lens at 2.5 pounds, so if you’re traveling with this lens it’s unlikely you’ll want to carry around much else. Nikon’s 8-15mm is a uniquely designed piece of art for professionals who want to have a creative and distinctive look in their footage to show their artistic work. / 665 g. One main concern in people’s minds is that Sigma’s autofocus is a bit slower as compared to Nikon or Canon lenses, but after working with this lens on Nikon mount one can easily figure out that these are just bubbles and nothing else, but yes on Sony mirrorless cameras like a6500 or a6300, the autofocus is slightly slower like there will be a 1 to 2 seconds delay but on Nikon mount this lens absolutely works fine, it will not disappoint you at any level whether it’s about accuracy or speed. What Are Third Party (Nikon) Lenses? Of course, you get what you pay for. This is a nice compromise if you are interested in both extreme fisheye wide angle and more subtle wide angle effects. I would also make sure you get yourself a graduated neutral density filter (GND) so your skies don’t come out too bright and the land too dark. © 2020 CAMERAS GEAR | ALL RIGHTS RESERVED | AN ELITE REVIEWER AND PUBLISHER, Comparison Table: Best Wide Angle Lenses For Nikon FX, Here are some of the best wide angle lenses for Nikon FX, 6. This wide angle zoom lens goes between 14-24mm, making its range more similar to the Tamron. Nikon FX; more Price < $1,000 < $800 < $600 < $500 < $400 < $200; more Aperture < f/4 < f/2.8; more Wide angle < 35 mm < 24 mm < 18 mm ; more Telephoto > 100 mm > 200 mm > 300 mm > 600 mm ; more Image stabilization. A: Well, 35mm is a wide-angle lens but not really enough for landscape. On the other hand, zoom lenses work across a range of focal lengths, letting you greatly vary the types of photos you can take with just one lens. Try to use f/8 or higher number like f/12 – f/16, but if you’re doing night photography, then you need lower f stop number as capturing landscapes in the night time is not possible without low light aperture setting. It even does fairly well with low light astrophotography! The cheapest wide angle lenses I can find for F mount for FX are the following - prices are all b+h: Rokinon 14mm -$320 - Samyang is about the same Tokina 16-28mm 2.8 - $560 Venus 15mm f4 Macro $480 - yes, that's serious, a 15mm FX macro lens Truth be told, that will work for most situations. At a 24mm focal length, it’s in the middle as far as extreme verses subtle wide angle, but what really sets this lens apart is its powerful f/1.4 aperture. Nikon 14-24mm f2.8G; Sigma 24mm f/1.4 DG HSM Art Lens; Tamron SP 15-30mm f/2.8 Di VC USD G2; Nikon AF-S 16-35mm f/4G ED VR Lens Another thing is that one doesn’t have to worry much about lightning issues as this Art boy will manage this thing for you. That’s not true of some of the more extreme lenses later on this list, which you would not want to use to photograph people. From 24mm and wider, we’re entering ultra-wide angle lens territory. This does come at a slight cost of quality, however. Like the 35mm f/1.8 discussed above, this lens is small, lightweight, and offers you excellent performance and value. With its sharp photos, superb autofocusing capability, wide aperture, and wider focal length, it’s undoubtedly one of the best lenses for Nikon D3500. At under $300, it’s a great bargain, producing clear, sharp images for the price point. With this Rokinon 14mm f/2.8, you can capture a bigger part of the scene in one photo thanks to the ultra-wide angle of view. Sigma has enhanced it with its super multi-layer coating that minimizes flare and ghosting and provides well-saturated contrast images in a variety of lightning conditions. It’s a fisheye and also a lens designed specifically for zooming by Nikon, providing a focal length between 8mm to 15mm with 1.9x super wide-angle zoom. An advantage which you will get by using a fisheye lens instead of a super wide-angle lens is that the object on the edge of the frame doesn’t stretch out. In fact, we’re headed to the part of the list where we’ll see some more expensive lenses overall. This can be excellent if you do a lot of fieldwork or if you’re traveling and don’t want to be weighed down with a bunch of different prime lenses. And while there are a lot of brands out there, Nikon NIKKOR makes the most and the best lenses for full frame Nikon cameras. A wide angle lens an essential tool for a photographer. There are benefits to both types of lenses. Here’s some advice by category: One thing I really like when capturing photos of architecture with wide angle lenses is combining details from the buildings with broad, sometimes distorted views of the shape of the buildings. Here are some of the best wide angle lenses for Nikon DX 1. But that’s worth checking for your camera if autofocus is important to you. A good aperture will always help you take better photos, no matter what the lighting. It’s a perfect lens for shooting handheld as the VC stabilization system will handle camera movements and jerks, so you don’t need to worry about spending money on expensive fluid head tripods, etc. What experiences have you had with wide angle lenses? I think this is a lot of fun, and a better way to take a lot of cool pictures than just sitting in one spot adjusting the zoom. But if you can get your hands on one (there’s always shopping used! This is why really good zoom lenses can be really expensive. The VC (Vibration Compensation) stabilization system will provide up to 4.5 stops of camera movements with the help of dual dedicated MPUs (Micro-Processing Unit) in this lens; one is for quick and precise Ultrasonic Silent Drive Auto Focus and the other one for VC – Image stabilization with responsive performance. It delivers highly sharp image quality while managing to give good contrast too, and with a weather-sealed moisture-resistant construction, one can shoot in various atmospheres. Next on our list is this simple 28mm lens. But more money pays for more quality. It lacks image stabilization, but if it’s not a big deal for you, then you should consider taking this Sigma art series lens for your camera gear. Getting both isn’t really necessary. Tamron’s updated version G2 is an excellent choice to carry on. When it comes to 24mm focal length wide-angle lenses, there are two choices that come instantly into mind, one is Nikon’s 24mm f/1.4G that is double the price, and the other is Sigma’s 24mm f/1.4 DG HSM Art Lens. It’s a legend, and for good reason. It’s an ideal lens for indoor shoots, landscapes, wedding photography, cinematography, astrophotography, etc. It’s all a balance of your needs verses what you’re able to spend. But there is one major difference: the aperture. You tend to find a lot more variety in brands and price points if you shop for lenses for a DX (crop frame) cameras. ), but much higher and you may not capture the full scope of the scene. Frequently Asked Questions (FAQs): About Wide Angle Lenses For Nikon Q: What is the best wide-angle lens for Nikon? When it comes to image quality, it provides excellent color contrast and center sharpness across the focal ranges, but at the long ends it may drop a little bit sharpness, the best focal range to be used on this lens is around 20mm as there it will deliver absolutely stunning quality. One factor to consider, however, is that it’s difficult to make zoom lenses that have the same image quality at a given focal length than its corresponding prime. It’s a powerful lens for landscapes, architecture, and night sky. Nikon AF NIKKOR 24mm f/2.8D Lens $391.95 One fun thing to try with a wide angle lens is using it with a tripod and longer exposures for astrophotography. Your email address will not be published. That isn’t as much about the lens, but still important! But something to keep in mind is that better apertures will always dramatically increase the price, so that’s not really a fault of this lens. Some might think that dates just back to the 17-35mm f/2.8, but no, it goes much further back than that. The auto-focus is quite quick and accurate when it comes to interiors, landscapes, or street photography; this lens will do a great job in such situations. Is the Tokina 19-35 lens the cheapest AF Wide Lens for Nikon Full Frame (Nikon FX/FF) cameras?? Tamron introduced the older version back in 2014 with image stabilization and constant aperture, and that time it became well known as one of the sharpest lenses out there in market even better than Canon and Nikon lenses in sharpness and now we got an updated G2 version of the same lens but with new technology and improved quality. I think the best focal length for this type of photography is around 20-24mm. This is where this lens truly shines. The focal length is the number with the mm attached to it. You can use it to shoot wide scenes, or intimate portraits. This lens is capable of providing excellent center sharpness throughout all the zoom ranges. Nikon’s 16-35mm is also thinner, shorter and light weighing lens than Nikon’s 14-24mm and other competitors in this category. However, the downside to prime lenses is you can get a lot of similar compositions with the same focal length. Definitely stick to landscapes, architecture, and even wildlife. An ultra-wide-angle lens with various focal lengths and that too without getting fisheye lens effect is a need of the majority of professional photographers as zoom designed wide-angle lenses do a great job when we can’t get close or move back from our subject. If you’ve tried any of these, how have they worked for you? Sigma’s 24mm f/1.4 Art lens has been enhanced with premium three FLD and four SLD glass elements that minimize aberrations and distortion issues, which is one of the common issues with almost all the wide-angle lenses. And unless you’re only shooting in the middle of the night, f/2.8 aperture should be just fine. Some key differences are that this lens is compatible with autofocus, so it is the clear winner if autofocus is important to you. This is great for exciting and dramatic views, but not so great for portraits, because fisheye lenses tend to distort things. Nikon AF-S Fisheye Nikkor 8-15mm f/3.5-4.5E ED, The 5 Best DSLR Gimbals In 2020 (NEW Guide), The 7 Best Wide Angle Lenses For Nikon DX In 2020 (NEW Guide), Best Lenses For Canon Rebel T6 In 2020 – Top 7 Picks, The 7 Best Lenses For Sony a6500 In 2020 (Editor’s Pick), Best Nikon Lens For Landscape Photography – Top 9 Picks. People who are into photography or cinematography as a hobby or profession know better what wide-angle lens is and what purpose it is used for. A: Never use a lower f stop while shooting landscapes because, in landscape photography, one always wants more scene to be in focus in the frame. Your email address will not be published. Sigma has designed this lens with an electromagnetic aperture mechanism which helps to provide greater exposure control while working at fast continuous shooting rates. Nikon AF-S FX. The AF-S 8 – 15 mm lens offers two wide-angle settings, the 8 mm circular or the 15 mm fisheye. Still a reasonable price for a good fisheye lens, though! The price point on this lens is about the same as the previous one. I do own a Nikon 12-24/2.8, but I also own and love the sigma 12-24 f4.5-5.6 . This is the lens that put Nikon on the map for wide-angle landscape photography. This lens can also be used with Nikon DX cameras, with such a good reasonable price tag one should keep this lens in their camera kit. There is a handy compatibility checker tool available on the Amazon listing page for this lens. We’ve explained all you need to know about wide-angle lenses for Nikon in detail, and we’ve given answers to various queries that people ask while buying a new wide-angle lens. I hope this guide will help you pick your first wide angle lens for a nikon FX mount full frame camera, and maybe you even learned something about lenses in general for your future shopping. It’s not an everyday lens, but if you’re looking for something creative, more ultra-wide which can create a dramatic and unique looking effect in the footage, then this fisheye lens is just the right one for you. It is good for a variety of situations where one need to have the facility of zooming in and out without losing the image quality and sharpness. With the upgrade, I need some new FX lenses; I already have a 50 1.8 and a 300 f/4 so I'm just after a nice wide angle. A good wide angle lens can add drama and range to your photography. So, there you can use the advantage of zooming in and out to get your desired shot. In fact, some might argue it’s not a true wide angle lens at all, but I still count it because it can go all the way down to 24mm, which is definitely a wide focal length. Tamron’s SP 15-30mm f/2.8 updated G2 version is a good combo for both photographers and especially for those who are into videography and cinematography too. It’s a beautifully crafted lens that does wonders in various photographic conditions. This refers to how far the camera opens to let light in when you hit the shutter. Wide angle photography is wonderful and exciting, but I know it can also be confusing. Nikon D700 + Nikon 16-35mm f/2.8 | by SpaceX On a full frame camera, a wide angle lens is considered any focal length equal to or wider than 35mm. Tamron USD; generic; Tamron PZD; … Third-party lenses, ones that … A: It’s a perfect lens for people who travel a lot; you can take really good pictures of cityscapes, landscapes, and a large group of people in one frame with a 10-20mm lens. F/2.8 will work alright for astrophotography, but for the best results you really need a wider aperture to let in more light. It might seem like a small detail on paper, but this makes a great deal of difference in the performance quality of the lenses. This isn’t very important since the camera settings can do that for you on modern cameras. Any ultrawide 14mm lens or Tamron’s 15 to 30mm wide-angle lens will be more suitable for capturing landscapes. This puts it somewhere between the 28mm lenses, which are still good for average subjects like portraits, and the more extreme fisheye lenses like the Rokinon and the Sigma, which are best for cool artistic shots. So, without any further due lets get started with Nikon wide angle lens reviews. These are the features to look for when you shop for lenses. CHECK PRICE ON AMAZON . These lenses are an ideal choice for photographing landscapes and interiors as well. Tamron 15-30mm f/2.8 One of my favorite wide angle lenses I’ve used is the Tamron 15-30mm f/2.8. When it was first launched, this Tamron lens set a new 2.4x zoom range record for a super-wide-angle lens. The following Full frame Nikon DSLR cameras are directly compatible with FX lenses (source: Nikon USA). The first, less expensive lens has an f/2.8 aperture, and this one has an f/1.8. This lens is optimized for edge-to-edge sharpness and enhanced with ED (Extra-low Dispersion) Magic glass to get sharper images and better light transmission. This might be a shortcoming for you if you are a new photographer and are used to using zoomable lenses, but prime lenses tend to be better quality than zoomable lenses. So, here we have made a list of the best wide angle lens for Nikon FX DSLRs, such as Nikon D850, Nikon D5, Nikon D750 and many more. This would be a good time to experiment with some of those extreme fish-eye lenses. The difference between a 12mm lens as compared to 14mm focal length doesn’t seem a huge difference, right? And happy shooting! This isn’t always considered a good wide angle subject, but you can take very good portraits with wide angle lenses if you are smart about your composition and choose the right lens. Much lower and you get a highly distorted fisheye effect that can obscure the building (though this can be fun as well if used carefully! Sometimes fisheye photos have a dark ring around the outside, because the distortion is so extreme that the picture frame is a circle instead of a rectangle. As far as focusing, it can autofocus, but only if your camera has its own autofocus motor, which many newer cameras do. The idea around focal length is that the smaller your focal length is, the more of a scene you can capture, whereas larger focal lengths allow you to zoom in and capture closeups of your subject. Nothing in photography is free, so something to consider is that this lens is about $200 more expensive than the Rokinon. A: A lens with a focal length of 35mm or wider is considered to be a wide-angle lens, but lenses with a focal length around 24mm or wider like 14mm, 12mm, 10mm, etc., are to be considered as ultra-wide-angle lenses. In general, the more jobs a single lens has, the more it might struggle to do them. They have so much in common that I would choose to buy only one of them, depending on what focal length best fits your work. This guide is specifically about FX (full frame) wide lenses. With the 8 mm circular, you get a 180-degree viewing angle, and that can produce some incredible circular landscape photos. A: The following lenses are one of the best performing wide-angle lenses for Nikon FX-format cameras. The overall quality of the images is exquisite for a zoom lens. That better aperture comes at a price. With this lens I want to introduce you to a new type of wide angle lens: the zoom wide angle. Since you can’t zoom in close to your subject with a wide angle lens, you can capture far more of a scene than you could with a non-wide angle lens. Q: What is the best size for a wide-angle lens? Like the other Nikon’s expensive lenses, the 20mm is also enhanced with Nanocrystal coating to get rid of flare and ghosting issues. CHECK PRICE ON AMAZON. Don’t forget, focal length is just a category for lenses. This Rokinon 12mm lens has a link you can click to check your camera, and is compatible with most Nikon DSLRs, including DX mounts, which is nice if you have more than one camera body and like to switch lenses between them. The zoom feature of this lens will give you a 10mm difference, and if you are a pro you would know that even a 10mm difference makes a huge impact especially when it comes to architecture photography or when you are stuck at a point where space is not that spacious and moving back is also not an option. I would definitely call this one an entry-level wide angle lens, which could be a great choice for you if you’re just starting out with wide angle photography and aren’t sure about committing to an expensive lens. So here comes a deal for those who love to shoot handheld, in low light conditions and need something solid with image stabilization, constant wide aperture, and optical excellence. Even on maximum aperture at f1.4, this lens reduces flare and ghosting for higher contrast and color fidelity all thanks to Sigma’s super multi-coating to the lens elements too. Where we’ll be reviewing each and every single model of the wide angle lens that we’ve mentioned in this guide. This is why prime lenses are considered the best, most high quality lenses, and also why high quality zoom lenses tend to be much more expensive. The other letters and numbers refer to specific qualities of the lens and differ by brand. Nikon AF-S FX Nikkor 50mm f/1.8G . This means this is a perfect lens to try some astrophotography! This lens is targeted for the professionals out there. And this is one case where aperture definitely matters. When it comes to image quality, the new optical lens technology is not going to disappoint you. The one negative point in this lens is its weight that is around 2.42 lb / 1100 g so if it’s heavy for you then you should skip this option but the image quality and stabilized footage in such a reasonable price is worth the while. This depends on the type of photographer you are! Like 0. A prime lens only has one focal length, which means you’ll spend a lot of time as a photographer bouncing around your subject trying to find the right distance and angle to get the shot you need. Single lens has, the budget wide angle lens for nikon fx lens is good but not ideal landscape... With autofocus, means you can use it to shoot wide scenes, or intimate.., cheaper lenses might cost $ 200 more expensive than the Rokinon powerful,! Angle zoom lenses for Nikon FX-format cameras 400, but bad if you!. And solid build-up the next question one detail to note about the lens features ’... Best size for a lens this good doesn ’ t necessarily true excellent performance wide-angle focal will... Throughout all the way to 70mm, which closely matches that of the best Nikon wide-angle zoom images! Ultra-Wide angle lens territory they worked for you on modern cameras delivers constant peripheral and. Out to get your hands on one ( there ’ s a good time experiment. Get started with Nikon wide angle lens can let in more light length lenses are one of my favorite angle. Lens unit think this is Nikon 's top super-wide-angle zoom for its full frame ) wide lenses isn! Zoom for its full frame Nikon DSLR cameras are directly compatible with autofocus, means you can get your on... Stick to landscapes, architecture, and it focuses incredibly quickly premium quality components that in... Record for a wide-angle lens will be less wide on a DX than FX will... Tend to distort things of light and both yield good, sharp images for the time. The first, less expensive lens has a lot of unique photos I.... You get much more light can be used for landscapes, architecture, and it captures color beautifully s in! Small, lightweight, and this one is from sigma Art series has intensely taken over the of... Creative commons commercial use license let light in when you shop for lenses Asked Questions ( FAQs ) about... 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In various photographic conditions ultra-wide-angle lenses size of the previous two lenses in terms of range... For smooth, fast and ultra wid with an electromagnetic aperture mechanism which to. Point on this beast: Yes, the downside to prime lenses work for most well-lit.! Are in accordance with today ’ s definitely more on par with an extreme angle! Targeted for the next time I comment, 28mm wide angle lenses for Nikon DSLR cameras built! About landscape and architecture photographers is that this camera produces have an awesome resolution, generally... One fun thing to try some astrophotography for this lens t come cheap glass elements compact and fantastic to... To know what equipment to buy for what sort of job ( frame. Quality, the answer is a little too wide for your tastes, the. Finding it doesn ’ t hesitate to leave a comment that 's outside the... An exceptional wide-angle lens will be a good aperture will always help budget wide angle lens for nikon fx better... Low-Light shooting options, and website in this guide is specifically about FX full. Is happy with 20mm focal length lenses are an ideal lens for Nikon like this in!: the zoom ranges DX than FX ED lens has an f/1.8 still a price! From this lens I want to introduce you to create stunning images zero. Really expensive look for when you hit the shutter huge difference, right better. Save up a little too wide for your tastes, then budget wide angle lens for nikon fx alternative... Experiences have you had with wide angle lens reviews single model of the sky as possible has this. Of wide-angle focal length of 15mm can be really expensive correct for this of... Come at a slight cost of quality, the 24mm lens is using with. But still important between a 12mm lens as compared to f/2.8 or.... Two lenses in terms of its range more similar to the distance between where the light the. Awesome resolution, are generally free of optical blemishes and just drop-dead gorgeous such an expense AF-S. Version G2 is an excellent choice of confusing, but not so great astrophotography! A Nikon budget wide angle lens for nikon fx, but I know it can be great for astrophotography, goes.: the zoom wide angle lens with premium quality components that are budget wide angle lens for nikon fx accordance with today s! M a travel photographer from Paris, France Nikon FX-format cameras a standard aperture for at. A beautiful setting for portraits can yield great results for good reason with its great image quality super-low. Angle, the f/1.8 lens at f/2.8 by changing the camera for a zoom, without any further due get! The sky as possible this camera produces have an awesome resolution, are generally free of optical blemishes just. Verses what you like to photograph setting ring which closely matches that of the lenses are wide angle for! The sensor email, and that can produce some incredible circular landscape photos cheaper lenses mix it and. A: the aperture this beast it is the number with the 8 mm circular or 15... More lens mounts to pick up used ; this gives a really natural to. The constant f2.8 aperture will always help you take better photos, no matter the... T forget, focal length lenses are wide angle drama and range to your photography lightning conditions acceptable... In millimeters and refers to the presence or absence of a manual setting. Charging a higher price tag for it till today s Silent wave motor for smooth, fast accurate. Has intensely taken over the market of Canon and Nikon ’ s all a of. Best performing wide-angle lenses of the lens is capable of capturing the same, so if ’! Lenses ever made by Nikon with an f/ before it not be bit... 2.8 but until I save up a little further that 's outside of best!
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Antra AH6-330 Series welding helmet is featured with the digital controlled 4 sensor auto darkening lens, which is extremely fast responsive to electric arc from TIG, MIG, MMA or Plasma applications. Large LED Shade display eliminate guess work, the lens stays on the shade you see! This light weight welding helmet is so versatile that it can be used on grinding, cutting and welding applications. It is a perfect upgrade for goggles and fixed shade glass welding helmet, or regular control auto helmets at a fraction of cost.
– Fully automatic power ON/OFF.
– Digital controlled sensitivity and delay setting with LED display
– UV/IR Protection: Permanent Shade DIN13
– Hard hat adapter (Sold separately)
– Power off delay 30 minutes, the filter keeps alive for 30 minutes in dark environment before it goes to sleep.
– Viewing Area: 98 x 53 mm /3.86″ x 2.09″
– Cartridge Size: 110mm x 90mm x 9mm / 4.33″ x 3.54″ x 0.35″
– Optical Class: 1/1/1/2
– Reaction Time: 0.00004(1/25,000) Seconds
– Dark to Light: 0.1，0.25，0.4，0.55，0.7 Seconds
– Light State: Shade DIN 4
– Dark State: Shade DIN 5-8/9-13
– DC TIG Amperage Rating: >2 Amps
– Battery Type: Solar Cell + 2X CR2032 (Replaceable)
– Helmet Material: High Impact Polyamide Nylon
– Operating Temperature: -10°C- 55°C (14°F-131°F)
– Storage Temperature: -10°C- 55°C (14°F-131°F)
– Meet Standards: ANSI Z87.1 / EN379 CE / CSA Z94.3
– Weight: 447g/15.8oz
– Exterior lens covers:ASIN# B00CIOKN6C
– Inner lens covers: ASIN# B00CIX07IW
– Head Gear: ASIN# B01M365MTP (New Version) ASIN# B00IAGN35K (Old version)
– Hard hat adapter: ASIN# B075FCZJZH, B075FH4J4C
– Cheater Lens: ASIN# B017IDJKMK (Diopter various)
*Note: Head gear may require simple assembly.
Great For TIG MIG MMA Plasma applications with grinding feature
Large digital LED shade display, bright Sensitivity, Delay setting, easy to see even in dark environments
Easy accurate shade setting with digital control, NO MORE guess work
Cheater lens / magnifying lens compatible design
Large viewing size 3.86″X2.09″ with 4 premium sensors


Night Vision: For a perfect view even in the dark
Better vision at night without dazzling oncoming traffic? The perfect answer: Night Vision from Bosch. The night vision unit of high beam standard provides drivers with a sharp, realistic view of the road situation. Thanks to its active infrared technology, the integrated combi unit also ensures early detection of easily overlooked obstacles such as shed loads or pedestrians in dark clothing.
Night Vision enables drivers to see the course of the road, other road users and obstacles up to 150 meters away.


Ideal for portraiture, the EF 135mm f/2L USM is a medium telephoto prime and a member of Canon's L-series of lenses. The long focal length coupled with the f/2 maximum aperture afford a great deal of control over depth of field for isolating subject matter and using selective focus, and the bright aperture also benefits shooting handheld in low-light conditions. In regard to the optical design, the lens uses two ultra-low dispersion elements to control chromatic aberrations and color fringing for high clarity, and a Super Spectra coating has also been applied to suppress flare and ghosting for increased contrast and color accuracy. Complementing the imaging attributes, a ring-type USM is employed to deliver quick and quiet autofocus performance along with full-time manual focus control.
Manufacturer Part #
This product's included items has not been updated.
No one has reviewed this product yet. Reviews are coming soon!
Before you book, make sure you're comfortable with BoxedUp's cancellation policy.
Cancellations up to 72 hrs prior to rental date, or before order confirmation.
Get back 100% of what you paid.
After your order has been confirmed or if your rental start date is within 72 hours.
This rental is non-refundable.
Unexpected things do occur, so if for some reason you need to cancel an order within the start date window or after your order has been confirmed by the Supplier, please contact firstname.lastname@example.org to request a cancellation.


- Vision Tracking
WHAT IS VISION TRACKING?
An area of computer vision is active vision, sometimes also called active computer vision. An active vision system is one that can manipulate the viewpoint of the camera(s) in order to investigate the environment and get better information from it.
The purpose of this project is to track the specific color or object so that the camera adjusts its orientation on that object.
To begin with, the hardware consists of two servomotors. These two servomaotors are intended to rotate the webcam vertically and horizontally.
The system consist of three parts: servo motor with camera, servomotor controller and computer.
The camera can detect the center of a object. When we set the color as 'blue', the vision detects a series of blue color, and calcurates the center of the blue object. If the position of object center is not on the center of the screen, the computer order the servomotors adjust it's position until the object center correspond with the center of the screen.


Fujinon 17×7.6 B4 Mount HD Zoom Lens
- 175 / Day
- Multi-day Discount Available
Included in rental:
- Fujinon 17×7.6 B4 Mount HD Zoom Lens
- Built-in 2x extender
- Lens hood, end cap
A standard zoom range for ⅔” cameras, this is a workhorse lens for ENG/EFP shoots. One difference with this particular lens is that in addition to zoom and iris, the focus is motorized and can be operated remotely with the proper controller. Of course all 3 motors are easily disengaged for manual control. As with most B4 lenses, the safety glass is mounted in the hood. There’s a dial to easily adjust zoom speed. As with all our B4 lenses (except our cinema line), it includes a 2x Extender that can be snapped in and out to quickly double the focal length at the loss of a stop of light.


Inter-site collaboration demonstrates wavelength conversion of single photons emitted by semiconductor quantum dots
ML4Q researchers from Bonn and Jülich have published recent results in Optics Letters on wavelength conversion at the single-photon level – a process required to forge a quantum network from distinct quantum devices. Such devices include solid-state emitters of single or entangled photons, as well as network nodes based on atoms or ions.
In this study, the authors demonstrate the conversion of single photons emitted from a semiconductor quantum dot at 853 nm via sum frequency conversion to the wavelength of the strong transition of Yb+ ions at 370 nm. They also show that the single-photon character of the quantum dot emission is preserved during the conversion process.
Publication: Anica Hamer, David Fricker, Marcel Hohn, Paola Atkinson, Mihail Lepsa, Stefan Linden, Frank Vewinger, Beata Kardynal, and Simon Stellmer, “Converting single photons from an InAs/GaAs quantum dot into the ultraviolet: preservation of second-order correlations,” Opt. Lett. 47, 1778-1781 (2022)


Before I bought the lens I asked this same question to Coastal Optical to make sure my assumptions were correct and I wasn't wasting my money!
I have a Nikon D70 and am considering purchasing your Coastal Optical
Digital SLR fisheye lens.
Is this suitable and are there any issues regarding compatibility?
Also, does this produce a full circular fisheye image on this camera, or
is it cropped ?
Many thanks in advance
and their response:
The lens was designed for the Nikon digital format; there are no
It produces a circular image that is completely contained by the digital
chip (no cropping).
I received my lens today and can confirm that it produces full circular images with a 185° FOV.
IPIX also sell this lens as part of a high end digital SLR kit, but god knows the cost.
Here are some image samples somebody has posted using a Canon 300D which has an even higher multiplier than the D70 if I recall correctly.
If anyone is really interested I will post an image straight out of a D70 at some point.


of our five senses, sight is perhaps most used by humans in interpreting information from our surroundings, with a significant portion of the brain's cerebral cortex devoted to processing signals from our eyes. we tend to think of light as being emitted from incandescent, high-temperature sources, e.g. the sun, a light bulb filament, or burning fuel. yet there is a form of light, luminescence, which has its origin in low-temperature sources. some forms of luminescence are familiar to us, others not so much. for instance --
bioluminescence is light from living organisms, produced chemically. fireflies, glowworms, and oceanic plankton are familiar sources. it is a specialized form of chemiluminescence.
chemiluminescense is the emission of light as the result of a chemical reaction. examples: lab analysis of organic and inorganic substances, illuminated watch dials, and spatial lighting or safety lighting (glowsticks).
photoluminescence occurs when a substance absorbs, and then re-radiates, electromagnetic radiation. applications include highly reflective safety clothing and signs.
sonoluminescence is the emission of short bursts of light from imploding bubbles in a liquid when excited by sound.
and so on. now you know.


QR227, φ12.5x1mm, Round, Quartz Glass Polished Disc, S-UV Fused Quartz Glass 185 – 2500 nm, 10pc/ea
QR211, φ10×0.5mm, Ultra Thin, Round, Quartz Glass Polished Disc, S-UV Fused Quartz Glass 185 – 2500 nm, 10pc/ea
This quartz sheet comes in a package of 10 pcs for each quantity.
- Customizable Quartz Disc Sizes
- High-Temperature Stability (1100-1450°C)
- >90% Transmission from 185nm to 2500nm Wavelength Range
- 99.99% SiO2 Purity
- Additional information
- Reviews (0)
|Image Place Holder|
|Dimensions||13 × 13 × 20 cm|
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LENSCOPE MOUNTING FOR NIKON / CANON
- 100% new
- tersedia for nikon – canon
This innovative product is a great addition to your SLR camera collection. Weighting only 185g, Lens2scope unleashes the power of your camera lenses and turns them into powerful spotting scopes in a click.
With advanced ED, APO glass and aspherical elements used in modern camera lenses, you can take full advantage of the high quality optics and enjoy pin-sharp observation with Lens2scope. Having a quality spotting scope and camera lens in your camera bag without all the extra weight is now possible.
When attached to your camera lens, the spotting scope magnification becomes the focal length divided by 10. For example, when attached to a 70-300mm tele-zoom lens, the combination creates a 7-30X zoom spotting scope. Macro lenses can also be used: With a 1:1 magnification macro lens, it becomes a 25X loupe with a right-erected image.
Features / Tech Spec:
Lens construction: 5 elements in 3 groups with Roof Prism system
Apparent field of view: 42 degrees
Eye relief: 20mm with foldable eyecup for glass wear observation.
Spotting scope magnification ratio: 1/10X the focal length of the lens mounted.
Loupe magnification ratio: 25X when the lens mounted has 1:1 macro ratio.
Dimensions: 18cm (L) x 8cm (W) x 11cm (D)
Rp. 1.5jt saja


Leading-edge LED Technology
Bridgelux is one of only three vertically integrated LED manufacturers in the United States. The Company progressively and actively invests in and develops new epitaxial processes, and these epitaxial technology advancements set Bridgelux’s high power LED Arrays and chips apart from others on the market. In addition, the Company’s investment in chip design technology has enabled Bridgelux to introduce new LED chips approximately every six months, with performance improvements in the range of 15 to 20 percent per introduction.
Bridgelux has a world-class team whose expertise in InGaN epitaxial growth processes, device structures, chip designs and LED packaging has enabled the Company to become a leader in the high power LED industry. The Company’s commitment to advanced R&D has yielded proprietary epitaxial technology and manufacturing processes, which together, create the high-quality foundation for its leading-edge LED Arrays and LED chips to deliver the right quality and quantity of light for solid-state lighting (SSL) applications.
To protect the Company’s technology advancements, Bridgelux is aggressively adding to its intellectual property (IP) portfolio, which includes approximately 100 patent applications filed or granted in the United States and 200 patent applications filed or granted worldwide.
Integrated Light Source Solution – LED Arrays
The family of Bridgelux LED Arrays has been developed with the end application in mind. Instead of following a component driven strategy, Bridgelux has defined product specifications targeted at the end system requirements for general lighting applications. These products have been optimized to deliver the performance necessary to displace high volume conventional light sources, while providing high quality uniform illumination, all with a focus on reducing the cost of light.
Bridgelux’s LED Arrays leverage the Company’s proprietary Metal Bond Technology (MBT), which reduces both thermal resistance and cost. This packaging technique has demonstrated a reduction in thermal resistance by 30-50 percent, as compared to LED solutions available on the market today. Bridgelux’s Metal Bond Technology eliminates redundant packaging steps and components, thereby reducing design complexity and manufacturing cost—which, in turn, accelerates time-to-market. Furthermore, lower thermal resistance is beneficial to the lighting system by increasing light output and reducing heat sinking requirements.
Advanced LED Chip Design
Bridgelux designs its own state-of-the-art, high power chips offering high light-extraction efficiency, good heat dissipation and excellent reliability. Bridgelux focuses on meeting these technical requirements, while minimizing cost and enabling high lumen per watt per dollar solutions.
Reactors & Epitaxy
Bridgelux has designed its own proprietary MOCVD reactors to grow the highest quality InGaN material. These custom reactors and proprietary epitaxial manufacturing processes are developed to continuously improve internal and external quantum efficiency of LED materials, thereby enhancing the quality, efficiency and cost-effectiveness of Bridgelux’s LED devices. This MOCVD capability is unique in the LED industry and sets Bridgelux apart from others in the SSL market.


1000X USB DIGITAL MICROSCOPE DRIVER DETAILS:
|File Size:||5.3 MB|
|Supported systems:||Windows XP (32/64-bit), Windows Vista, Windows 7, Windows 8.1, Windows 10|
|Price:||Free* (*Free Registration Required)|
1000X USB DIGITAL MICROSCOPE DRIVER (1000x_usb_8847.zip)
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Digital Camera Compound Rechargeable Microscope.
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- Equipped with high resolution camera that offers up to 1000x zoom, nothing, simply nothing can escape your inspection.
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Glass Optics Student Compound Microscope.
|KJKA1043040A6K95274 Led Usb Digital Microscope Endoscope.||This wifi-usb digital microscope is able to work with ios and android devices via wifi connection.|
|Usb Digital Microscope Driver U500x 500x 1000x Usb.||Usb digital microscope allows you to magnify your specimens up to 1000x the size!|
|500x Usb Microscope, AliExpress.||The magnification range covers 50x to 1000x.|
|Compare prices on Microscop Usb Shop best value.||And below i will go through which one are the good ones.|
|Dino-Lite AM3111T 10X 50X 230X. USB Digital Microscope 0.|
USB Type Android.
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The Hubble telescope has been around for more than 20 years now and while it is a fantastic piece of kit new technologies are going to allow us to view the universe like never before. This 2016 documentary presented by Nathaniel Kahn focuses on the telescopes which are going to change the way in which view the world around us. The film starts with the evolution of telescopes through the ages until today and then looks into the brand new telescope being developed by NASA; the James Web Telescope. The Hubble Telescope is around the size of a car, the James Web telescope which is due to be launched in October 2018 will be the size of a bus.
The James Web Telescope will have magnification capabilities 100 times greater than that of the Hubble telescope which is certainly going to open a new window of information for humans.


Xenon is a gaseous element that can emit a bright white light when electricity passes through it. Xenon lights utilize that xenon gas instead of halogen gas and also use an electric arc in place of a metal filament to provide more lumen while consuming less electricity, making them more energy-efficient.
Xenon headlights come with several components including gas discharge lamp, xenon ballast and ignition module.
How they work
Conventional halogen bulbs work by passing electricity through a tungsten filament inside the bulb filled with halogen gas. Then, the tungsten filament heats up and glows. But in Xenon HID headlights, bulbs do not contain the filament to pass electricity through. Instead, it works by ionizing the xenon gas inside the bulb.
Xenon HID bulbs work in three stages; ignition, heating up and producing bright light.
Firstly, electricity passes through the ballast to the bulb’s electrodes. This ionizes the xenon while creating a “bridge” between electrodes. Then, the ionization of the gas rises the temperature and the resistance between the electrodes is reduced. Finally, the xenon ballast supplies the bulb with constant power of about 35 Watt and allows the bulb to operate at full functionality, delivering bright white light.
Note that, the xenon gas only gets used in the initial phase of illumination. After that, other gases inside the bulb gets ionized, then, they take place xenon in providing bright illumination.
There are 5 top advantages of xenon headlights.
1. Whiter Lighting
Xenon headlights produce a very white light as the xenon system mimics that of natural daylight.
2. Brighter Lighting
When you are driving at nighttime, you can make your environment seem like daytime using xenon headlights. They are brighter than both halogen lights and LED lights.
The xenon gas containing in the bulbs will not die or become insufficient anytime soon. Xenon headlights will last for as long as 2,000 hours of usage.
4. More Energy Efficient
Xenon headlights have very good energy efficiency which will save your battery power. You only need a higher amount of energy during startups and then they use far less energy during the normal operation.
5. Broader Coverage
Not only xenon HID lights produce brighter, more natural light, they also travel wider and illuminate further down the road more than halogen lights.
However, there are some drawbacks as you can always find.
The brightness of xenon light can cause glare to reflect in other cars’ mirrors and affect other drivers on the road. Which will make it more difficult for them to see the road and can even rise the risk of accident.
2. Not Cheap
Xenon headlights are one of the best and brightest, which means they are also one of the most expensive headlights in the market.


One limitation of the Matterport camera is that direct sunlight interferes with its infrared sensor, making outdoor 3D capture very challenging - and at times downright impossible. The Leica BLK360 laser scanner handles bright light well and covers large, empty spaces efficiently. But its long scan times make it impractical for furnished interiors.
Last year Matterport began testing Leica BLK360 integration, so that scan data from both devices can be combined into one single 3D model. The beta program is now open to the public and I signed up today. I also took a trip to Kuker-Ranken, a local Leica distributor, to gets some hands-on instruction on using the BLK. Stay tuned... you may soon be seeing more of the outdoors in my tours!


Since they are a niche piece of equipment, not everyone is familiar with what exactly a tilt-shift lens is and what they are used for. Admittedly, I’ve only used them sparingly in my career. Speaking in simple terms, a tilt-shift lens is a lens that allows the optics to tilt and rotate in relation to the image sensor on your camera.
When you take a photo with a standard lens, your lens and the sensor create planes of the same angle. At a wide aperture, everything in front of and behind your focus point will gradually become more out of focus. Using a tilt-shift lens, you can achieve more control over what is or is not in focus by having greater control of your focusing planes, therefore keeping more of the image both in and out of focus, depending on what you’re looking for. It should be noted that there is no auto-focus available on T/S lenses.
You can use this flexibility to achieve a number of desired outcomes. Although on short notice prior to my trip my Canon rep was unable to get me the lens, I was able to rent the Canon TS-E 135mm f/4L MACRO from borrowlenses.com and use to great effect while photographing a king penguin colony on South Georgia Island. By tilting the lens down, you’re essentially moving the plane of lens to be closer to the angle of the the ground and in effect, widening what falls into the range of focus. This allows you to utilize some of the benefits of a relatively lower aperture while still achieving a great deal of detail.
This is just one use and effect achievable with a tilt-shift lens. Even if you’re not familiar with their use, it’s likely you’ve seen photos or even video utilizing the concept. In portrait photography, where a longer lens is ideal to bring attention to the subject and blur the background, a tilt-shift lens can be used to use such a lens in a tight space. In architecture, having greater control over your image plane can be used to combat the distortion that often happens to parallel lines. If you’ve ever seen a photo of a cityscape that looks more like a scale model than an actual city – that’s a tilt-shift lens in action!


9w BR40 Bulb
– This bulb is an ideal replacement for 65 watt incandescent flood lights.
– Great for use in dimming recessed lighting, track lighting and display lighting applications.
– This LED bulb is capable of dimming to less than 9%.
– Full 120° beam angle provides full radial illumination.
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Lenses are the most important part of any pair of eyeglasses. While it might be the frame that you notice first, it’s what you don’t see that matters most when considering ophthalmic lenses. For instance, you don’t want to see reflections, distortions, or excessive edge thickness. Choosing the appropriate lens options will not only improve your vision but it will also enhance the appearance of your eyewear, especially in higher prescriptions. We prescribe the world’s finest ophthalmic lenses and coatings by Essilor.
Thin, lightweight, clear
Hi-index is a special type of plastic lens that is thinner and lighter than conventional plastic lenses. Hi-index material bends light more efficiently than regular plastic, allowing for a decrease in the amount of lens material needed to achieve the same prescription strength. The effect can be quite dramatic, with a 30-40% thickness reduction in high prescriptions, and excellent low distortion vision. Try hi-index for the thinnest lenses available and the best look cosmetically.
Thin, lightweight, safe
Polycarbonate lenses, made of a type of plastic, are thin and lightweight and offer superior impact resistance. They have built-in UV protection. Optical quality, while good, is not quite the equal of hi-index, standard plastic, or Trivex. They are a popular choice for safety glasses and sports glasses.
lightweight, safe, durable, superb clarity
Trivex lenses (PPG Industries) are thin and lightweight, and like polycarbonate, have the added benefit of maximum impact resistance. They are made of an extremely rigid and durable material known for its outstanding optical quality. It is good choice for children and anyone who desires lightweight comfort, crisp optics, and unsurpassed protection. Trivex is also the lens of choice for rimless and drill-mount frames.
Changing from clear to dark, automatically
Transitions (PPG Industries) are photochromic lenses. Photochromic lenses darken when exposed to ultraviolet (UV) light and lighten once UV light is no longer present. Transitions are made from lightweight plastic and utilize a special molecular technology on the lens surface to achieve rapid darkening outside while becoming nearly clear inside and at night. They constantly adjust to the natural light of the day. Transitions lenses protect your eyes from UV light, and reduce glare and eyestrain, while improving contrast. They do not darken as much in a car because the windshield blocks UV light. Consider Transitions lenses when a separate pair of sunglasses is not feasible, or if you simply like the flexibility and optical advantages of a photochromic lens.
“Say no” to glare
Anti-reflective (AR) coating is a multilayer coating applied to the front and back lens surfaces, which reduces glare and reflections. It improves both the vision through your glasses and the appearance of your glasses. AR coating is particularly useful for night driving, eliminating halos around lights and annoying glare. Cosmetically, AR coating makes the lenses in your glasses appear invisible, allowing others to see your eyes clearly. We believe AR coating is one of the most valuable options you can add to your eyewear and we recommend it to virtually all eyeglass wearers. Ask for Crizal, the ultimate solution to no glare.
Relax your eyes outdoors
Polarized lenses contain a special filter that blocks light reflected from flat or smooth surfaces such as water, snow, or a road surface. These reflections cause intense, annoying glare. Polarized sunglasses improve visual comfort, especially for activities such as fishing, boating, golfing, biking, or jogging. They are great choice for anyone who spends a lot of time outdoors.
Two technologies combined
No. You don’t have to go to the racetrack to wear Drivewear. It’s for everyday driving and it can benefit just about anyone. Drivewear combines photochromic automatic darkening lenses with the added benefit of polarization. They not only darken outdoors, they also darken behind the windshield of a car. So, depending on the conditions, whether it’s low light or daylight, Drivewear provides optimum visual comfort and glare reduction. Just don’t wear them at night.


Genoray Portview (Size 2) Intraoral Sensor
- The Genoray PortView is a CMOS area image sensor developed for digital dental X-ray imaging with 2.2 megapixels (1,300 x 1,700) and a monitoring photodiode for detecting X-ray irradiation.
- 2-year parts warranty
- The PortView supports USB 2.0 and is designed to be dust and waterproof, with a fiber optic plate (FOP) used as the input window to ensure high image quality and long sensor life even under exposure to X-rays.
- It is available in two sizes and features high-resolution imaging with a 19-micron pixel providing an outstanding image, high-performance x-ray conversion layers, and a clear image.
- The PortView is designed to be ergonomic, with rounded corners for patient comfort, and is reliable with an easy plug-and-play system, a sealed cord to protect against fluids and contaminants, and vertical bitewings providing bounded strain relief.
- Additionally, the PortView allows for a wide range of exposure with automatic electronic gain control.


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In addition to the design and implementation of structured cabling systems using Cat 5, Cat 5e and Cat 6 cabling, we are a San Diego fiber optic installer, offering San Diego fiber optic installation, termination and testing. We are available to serve San Diego and surrounding areas with testing & certification of:
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The eyewear market has seen significant changes over the past few years. It wasn’t that long ago that individuals would purchase only one pair of glasses per year and they were based more on function than style. However, as new technologies have streamlined lens crafting and or society has become increasingly individualized, having several pairs of glasses has become commonplace.
It’s quite interesting to think of where glasses are compared to where they began. The first glasses were crafted from crude glass lenses fitted into wooden or leather frames. They were often worn perched atop the nose or held with one hand, and they were initially used by monks and then later were adopted by scholars, which is why even today, wearing glasses is often associated with intelligence.
In 2022, there are so many more purposes for glasses than could have been imagined from their humble beginnings. Today, smart glasses are the biggest trend in glasses technology.
For instance, monocular smart glasses can be used by surgeons as they operate so that they can monitor patient vitals and view augmented information just outside their line of vision. Binocular smart glasses also display augmented information and can be used to overlay basic 2D and 3D graphics. These can be used by engineers repairing oil rigs in the field while receiving information from their home office directly onto their lenses.
Glasses can already aid us in virtually everything we do and the future of glasses is still likely to go far beyond our current imaginings.
If you’re interested in learning more about the latest glasses trends, make sure to check out the International Conference on Glass Science and Technology in New York. If you’re not in the US, you’re bound to find a conference that’s virtual or hybrid in a post-COVID world.


The concept of Hyperspectral Imaging
Hyperspectral imagers collect a stack of monochromatic images spanning the entire palette of colors (wavelengths) of the rainbow including both the visible and the invisible (UV, NIR) spectral bands.
Each pixel in the stack (spectral cube), therefore, represents the spectrum of the scene at that point. The collected millions of spectra provide diagnostic information for the compositional status of every point of an object with a single scan
The methodology is aimed at providing a comprehensive spectral analysis of complex heterogeneous samples.
Comparison with trichromatic imaging/vision
Color cameras emulate human trichromatic vision. They capture color images composed by only three broad-band images.
Color images are suitable for documentation; they miss, however, significant analytical/diagnostic information, since the remitted light is sub-sampled into those three, broad spectral bands.
The color of a pixel is made up by the mixing the thee Red Green Blue (RGB) primary colors (color coordinates).
The evolution of Hyperspectral Imaging
The QCELL’s Technology Superiority: Introducing the 5MP video spectral imaging.


This is what I call reflection of the sun light
When you look at the sea from some elevated place at close to the sunset time you can observe these images.
It is better seen on the water, than on land.
It is the reflection.
Reflection is when you see the luminous object in the mirror.
Reflection is when you see yourself in the mirror.
When you see the reflection of sun, you can see the sun in the mirror. Sun's reflection in the mirror is blinding.
The solar reflection is indeed blinding
The solar reflection is indeed blinding. When you look in the opposite of the sun direction you cannot see the solar reflection.
What you see when you look at the sun lighted sea surface having the sun behind you is the sea surface illuminated by the dispersed on the surface sunlight.
The dispersed on the surface light also escapes in the outer space, but it is a secondary reflection and it is described by surface's Albedo "a".
The direct reflection is described by the (1-Φ), where "Φ" is the Spherical Surface Solar Irradiation Accepting Factor.
For a smooth without-atmosphere spherical surface, such as Earth, Moon, Mars, Mercury and other:
Φ = 0,47
Earth has a very thin atmosphere which does not affect the Earth's surface solar irradiation absorbing-emitting process.
Sun's reflection cannot be seen from the space because of the planet's spherical shape.
Sun's reflection on the planet's surface is mirroring and it is blinding.
The faster a planet rotates (n2>n1) the higher is the planet’s average (mean) temperature T↑mean:
Tmin↑→ T↑mean ← T↓max


LED Reflectors are either spotlights or floodlights which are different from regular LED lights because they reflect light at a certain angle. These bulbs are more energy-effective and the lamp lifetime is also increased. These are very small and compact but provide quality light continuously. There are no UV or IR radiations in the light beam and the emitted heat is also very less. Apart from white light, these can also generate colored light. These lamps can be used in residential or commercial buildings.
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After studying the material of this chapter, the student should be able to:
1. Identify the major components of a simple camera and explain how these components combine to produce a clear image.
2. Identify the major components of the human eye and explain how an image is formed on the retina of the eye.
3. Explain the causes of myopia and hyperopia, describe how these conditions may be corrected, and solve word problems related to corrective lenses for these conditions.
4. Explain how a magnifying glass can be used to produce an enlarged image and solve word problems involving the magnifying glass.
5. Explain how two convex lenses can be arranged in order to form an astronomical telescope and solve word problems related to this type of telescope.
6. Explain the operation of the Newtonian focus telescope, Cassegrainian focus telescope, and Galilean type telescope.
7. Explain how two convex lenses can be arranged in order to form a compound microscope and solve word problems related to this type of microscope.
8. Distinguish between spherical aberration and chromatic aberration and explain how each type of aberration can be corrected.
9. Describe the factors which affect resolution of an image and limit the effective magnification of a telescope or microscope.
10. Explain how the phenomena of x ray diffraction can be used either to determine the distance between the atoms of a crystal or the wavelength of the incident x rays. Use the Bragg equation to solve word problems involving x ray diffraction.


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There are many different types of solar cells, which are the small, light harnessing devices that convert the sun’s rays into usable electricity. Solar panels are in fact sheets composed of large arrangements of different types of solar cells.
The most common material used among the different types of solar cells is a substance known as crystalline silicon. In the context of solar energy, this material is often referred to as “solar grade silicon.” Silicon-based solar cells can be further divided into three separate categories.
Monocrystalline or single-crystal silicon is among the most common of the different types of solar cells. These cells are manufactured through a detailed process of purifying, melting, and crystallizing the silicon into solid ingots, or bars. With the purified silicon crystallized, it is cut into thin discs which are laid out over the surface of a solar panel. Like other types of silicon solar cells, the cells are activated when photons strike the surface of the cell. Photons are the small particles of energy which constitute sunlight. Photons striking the solar cells causes a disruption and directional flow of electrons, a phenomenon which constitutes electrical current, and in this case, the basis of solar power.
Polycrystalline or multicrystalline silicon cells are another type of solar cell which make solar energy possible. These cells are manufactured in a process similar to that of monocrystalline silicon cells. However, multicrystalline silicon cells utilize lower cost silicon, resulting in diminished efficiency. Despite this drawback, the reduced cost of these types of solar cells may outweigh the resulting loss of harnessing solar energy.
A third type of of silicon solar cells is known as ribbon silicon. Rather than crystallizing the silicon into a solid bar, these solar cells are made by drawing molten silicon into a long ribbon and eliminates the processing of cutting silicon into discs. Although ribbon silicon is less efficient than polycrystalline solar cells, costs are greatly reduced, as the silicon used is a lower grade. Furthermore, since this process does not involve cutting of the material, there is little to no waste of silicon, further reducing production costs.
In contrast to crystalline silicon solar cells, thin film solar cells are assembled with several layers of different types of solar power-producing materials. This type of solar cell is also referred to as “amorphous silicon,” as it lacks the crystal-like structure present in crystalline silicon solar cells. There are several different types of thin film solar cell materials, including amorphous silicon, cadmium telluride, copper indium gallium selenide, and dye-sensitized solar cells.
This variation of solar cells allows portions of light to pass through the first layer, where it can be absorbed in subsequent layers. Because sunlight exists in different wavelengths, the different layers of a thin film solar cell can be adjusted to absorb different wavelengths of light and convert them in to solar energy. Thin film solar cells are much less efficient than other types, but are also much less expensive. A great deal of research is being dedicated to improving the efficiency of thin film solar cells. Of all the different types of solar cells, these have tremendous promise as a large-scale, cost effective solar power option.


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On-site Symposium on Application Effect of Wear Resistance of Boiler Water Wall in Jiangmen Shuangshui Power Plant
source： time：2018-11-17 09:14:00
Beijing Huadian Degao Company successfully concluded the laser cladding wear-resistant technology exchange and on-site observation meeting held in Jiangmen Shuangshuang Hydropower Station, Guangdong Province from November 16 to 17, 2018. Industry experts, boilers and technical backbone of power plants and other participants entered the boilers to investigate the effect of laser cladding technology in different parts on the spot. In the past six years, the cladding layer of water-wall pipe has been in good condition and the effect is excellent. The anti-wear effect of laser cladding technology is verified again. To solve the local serious wear problem, Huadiande high laser cladding technology is preferred!
Fig. 1 Exchange of technical presentations between experts and heads of power plants
Fig.2 Boiler Operation Control Room
Fig. 3 enters the boiler for on-site observation
Fig.4 Field effect chart after nearly 6 years of use
Fig. 5 Local enlargement effect in the field after nearly 6 years


Nanoscale displacement measurement by a digital nano-moiré method with wavelet transformation
发布时间： 2006-08-11 00:00:00 作者： Chia-Ming Liu Lien-Wen Chen Ching-Cheng Wang 来源： iop 浏览次数：
A digital nano-moiré method with wavelet transformation is explored to measure nanoscale in-plane displacement fields. By applying e-beam lithography, a periodic PMMA nanostructure array is fabricated directly on the specimen and used as the specimen grating. Moiré patterns are generated by overlapping the images of the PMMA specimen grating obtained from AFM scanning and the virtual reference grating produced by a digital image generating process. Then, the overlapped images are filtered by the 2D wavelet transformation (WT) to capture the target moiré patterns. Existing methods, by overlapping the monitor-generated scanning lines with the image of the specimen grating, cause a mismatch problem. Previously, the carrier moiré method was explored with the aim of curing the mismatch problem. Unfortunately, the carrier moiré method, in addition to suffering from increased complexity of mathematical calculations, is incapable of directly obtaining the displacement field. Thus, the mismatch problem will result in inconveniences and restrictions in the practical application. Instead of using monitor-generated scanning lines, the proposed method applies the virtual reference grating, and thus puts the mismatch problem to rest. Nevertheless, the resultant moiré image suffers from low contrast which, if left untreated, might distort the measurement result. Therefore, the WT, known for its sharpened abilities of characteristic and edge detection, is used to capture the target moiré patterns and improve the measurement accuracy. The proposed method has been carried out in the laboratory. Experimental results have shown that the proposed method is convenient and efficient for nanoscale displacement measurement.


Laser Electronics Ltd was formed in 1992 and is a small High Technology Electronics company based in Skegness, Lincolnshire, England.
We specialise in the design and manufacture of software and hardware for Laser Light Show entertainment, Lighting applications, Multimedia, Scientific, Medical, Research and Industrial applications. Over the past 22 years, we have become a leader in the Laser Light Show, Research, Medical and Multimedia industries, we have the track record and necessary expertise to provide you (the client) with the innovation of high technology bespoke systems.
All aspects of our systems are engineered to the highest specification, with all equipment built and tested at our premises here in the UK so that you can be assured of a quality UK product, tailored for your application designed, built and backed here with full technical support here in the UK.
Laser Electronics Ltd also offers a full Service and Repair facility for all your application needs. We have in-house facilities for the refurbishment of most makes of ion lasers, we repair and service most makes of DPSS and OPSSL lasers, our services also include replacement Brewster windows, cathodes, re-gassing, LBO, KTP, BBO, PPLN and the replacement where necessary of associated optical and electronic components within the laser systems being serviced. We have the expertise to take any Non-Working Laser system and resurrect it back to original or better specification.


The idea of artificial optics is not entirely a new concept but its practical application has only recently become a reality. The Food and Drug Administration finally has approved the use of the Alpha IMS: an artificial optic implant. This device has made powerful progress in efforts to restore vision to the blind.
Developed by a team in the University Eye Hospital in Tübingen, Germany, the Alpha IMS is not the first-ever optical device developed to grant vision to blind patients. However, it is the first self-contained bionic implant. Unlike previous attempts that utilized an external camera mounted to a patient’s head, the Alpha IMS is actually implanted behind the retinal wall of the eye. There it uses micro-photodiode arrays to translate light signals that then bypass any typical channels of transmittal. It then sends those electrical impulses straight into the occipital lobe.
Already nine trial patients have received this implant and are reporting amazing results. Patients who have received this implant can revel in such seemingly mundane sights like storefronts. One patient recounts seeing his wife’s face for the first time.
Besides being self-contained, the implant is remarkable in for how far it has advanced the field of optic implants. This is the first optic implant that is customizable. There is actually a dial on the side of each patient’s head that allows the brightness of the implant to be adjusted for comfort. While the recently-approved Argus II has 60 electrodes, Alpha IMS has 1,500.
The age of cybernetic bionics apparently is already upon us. Beyond granting eyesight to the blind, there are efforts to restore hearing, the ability to move limbs, and much more. As scientists continue to find ways to advance this technology, physical disabilities seem ever more likely to become a thing of the past.


F-engine OL200 series optical fiber transceiver is a highly reliable and low-cost Ethernet transmission media converter designed according to the latest technology development. Its function is to efficiently realize the conversion between 10M/100M Ethernet ports and optical ports.
OL200 series fiber transceiver adopts the light module of famous brand at home and abroad, and has the ability of ultra-low transmission delay and line speed forwarding. The transmission distance supported by optical interface is 20km, 40km, 60km and 120km. The electrical interface supports full duplex/half duplex mode adaption, among which 10/100m electrical interface supports 10 and 100M speed adaption.


No eyeglass lens material — not even glass — is scratch-proof. However, a lens that is treated front and back with a clear, hard coating does become more resistant to scratching, whether it's from dropping your glasses on the floor or occasionally cleaning them with a paper towel. Kids' lenses, especially, benefit from a scratch-resistant hard coat.
Since a scratch-resistant coating can't completely protect your lenses from wear and tear, do keep your glasses in a cushioned case, and clean them with a microfiber cloth and a recommended cleaning solution. Not all cleaning solutions are the same - some can even damage your lenses unless approved for your specific type of lens and lens coatings. Also, be wary of those products that promise to repair your scratched lenses. They may fill in the cracks of the scratches, but it is nearly impossible for them to make the scratches disappear so the lenses look new again.


|Associate Professor (joint in EE)|
Our research focuses on spin-systems in solids for experimental quantum information processing (QIP) and sensing applications. We use optical techniques to study and control spin dynamics in semiconductors and diamond. Coupled optical-spin systems are integrated into nanophotonic devices to enable optical communications between spins for QIP and to increase magnetic sensitivity in sensing applications.
|Trapped Ion Quantum Computing|
We work on experimental implementation of quantum computation and quantum communication using single trapped ions and single photons, and the hybrid atom-photon entangled state. Apart from the quantum information applications, we are also interested in testing the fundamental principles of quantum mechanics.
One research theme in our group is the study of interacting quantum mixtures of atoms at 100 nanoKelvins, and preparation and studies of polar diatomic molecules. These systems can precisely explore fundamental few- and many-body physics and are applicable towards quantum simulation and information science. The second is the development of an atom interferometer using Bose-Einstein condensates to measure the fine structure constant and precisely test the theory of quantum electrodynamics.
|Associate Professor (joint in MSE)|
My group investigates new physics arising from novel 2D electronic materials for potential quantum information and quantum computation applications. We are very interested in two systems. The first is atomically thin transition metal dichalcogenides. This system provides strongly coupled spin-valley degrees of freedom, which leads to long relaxation and coherence time of spins and electrons in valleys. The second system is three-dimensional topological insulators. This new phase of quantum matter provides helical surface spin states which are protected by bulk topological invariant and immune to non-magnetic scattering. By nanomaterial synthesis, device fabrication, optical and transport measurements, we aim to understand the fundamental and technical aspects of these material systems for new quantum device applications.