What is the difference between Sigma EM-140 DG Macro Ring Flash for Canon and Sigma EM-140 DG Macro Ring Flash for Nikon,
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The flash systems are technically identical but each system will only work with automatic settings with the electronics of the specified camera brands -- TTL. ETTL metering is camera brand dependent so a sigma ring flash made for a canon camera will not operate with the TTL settings on a Nikon Camera and the converse is also true -- This is a great ring flash but you must buy for the designated camera system to be able to take advantage of the automatic electronic systems. RS
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The nikon version supports i-TTL/D-TTL (where metering is done through the camera system), while the canon version supports E-TTL (Evaluative through the Lens exposure) II. Copy and paste the following link for a better explanation: http://photonotes.org/articles/eos-flash/. It's probably a proprietary software difference in the exposure calculations, but from what I understand the ringlights are otherwise identical, albeit probably not interchangeable.
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An external flash must "communicate" with the camera to which it is attached to fire properly. One of these is configured to operate with certain Canon cameras, and the other is configured to operate with certain Nikon cameras.
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The primary difference between the Canon EF 100 mm f /2.8L IS USM Macro Lens and the Canon EF 100mm f/2.8 USM Macro Lens is the IS. This refers to Image Stabilization. The IS in that lens is good to 4-stops (really probably 2 or 3) meaning it can compensate for the shake in the image from a longer exposure. This is a benefit for macro photography as it allows for a longer exposure with a smaller aperture, allowing for a greater depth of field in your image. You can search for macro photos on Google images and you will notice the small depth of field in most of the photos, which frames the subject well when used correctly, but when it is too small, only a small part of the subject will actually be in focus. Secondarily, the Canon EF 100 mm f /2.8L IS is a "L" or "Luxury" lens. Although partially a marketing gimmick by Canon, this means that the lens will be higher quality, have at least partial weather sealing, have a better outside lens coating, and generally be of higher build quality. As an owner of the less expensive of the two, and having used both, I would recommend buying the cheaper one if you just want to get started in macro photography, and maybe spend some money on extension tubes or a macro flash. If you are still curious about both these lens, I always recommend renting the lens in question before a purchase or going out and finding them in a photography store. I personally use lensrentals.com for my rentals, but there are several excellent renters on the web.
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Abdul, not knowing what the flash is intended for this is a hard question to answer. I will say the SB-910 as the flagship speed light will give you more options on your camera. Nikon D5000 or any of the D-5xxx series support TTL metering. Plus in manual mode there are additional options to control light output. The SB-910 is Nikons most expensive flash unit available and if money is not a consideration the buy it. It is also the most user friendly flash Nikon ever made. If indeed you don't require all this power I would also look into the SB-700. The SB-600 is not very user friendly and became obsolete even though it is a good unit which would have to be purchased used. Never mind those talking about using the SB-910 with D-4 or D-3 or even D-800. If you were using that equipment you not have asked that question here. The flash will work well with your camera and any upgrade by Nikon in the future.
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This ring has male threads on both sides. It enables you to put two lenses together for macro-photography. Normally you would use a small prime lens mounted in reverse in front of a longer lens, such as a 50mm lens in front with a perhaps 100mm lens(or a zoom) mounted on the camera in the normal way. Your brand of camera is irrelevant as the ring screws into the lens and is not attached directly to the camera. You are then using the prime lens mounted in reverse as a substitute for a closeup filter. Generally people use this setup to get magnifications higher than 1:1. You can use this ring in conjunction with a step-up ring if necessary to adjust to your particular pair of lenses. This ring has male threads on both sides. It enables you to put two lenses together for macro-photography. Normally you would use a small prime lens mounted in reverse in front of a longer lens, such as a 50mm lens in front with a perhaps 100mm lens(or a zoom) mounted on the camera in the normal way. Your brand of camera is irrelevant as the ring screws into the lens and is not attached directly to the camera. You are then using the prime lens mounted in reverse as a substitute for a closeup filter. Generally people use this setup to get magnifications higher than 1:1. You can use this ring... » Read More This ring has male threads on both sides. It enables you to put two lenses together for macro-photography. Normally you would use a small prime lens mounted in reverse in front of a longer lens, such as a 50mm lens in front with a perhaps 100mm lens(or a zoom) mounted on the camera in the normal way. Your brand of camera is irrelevant as the ring screws into the lens and is not attached directly to the camera. You are then using the prime lens mounted in reverse as a substitute for a closeup filter. Generally people use this setup to get magnifications higher than 1:1. You can use this ring in conjunction with a step-up ring if necessary to adjust to your particular pair of lenses. « Show Less
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The link for the comparison at cameralabs.com is not applicable because it tested the Sigma 18-200 DC prior to the release of the OS version. The OS version is much better optically than its predecessor and also includes HSM (High Speed Motor). I have read test reviews and comparisons at other sites such as popphoto that indicate the Sigma is sharper and has less distortion than the Nikon 18-200 VR, but they also state it is slightly louder. I just received my Sigma 18-200 OS today and have done limited testing, but I can tell you the AF and OS noise are not bad (the OS chirps when it turns on and off). The Sigma AF is louder than my Nikon 18-135 (w/SWM), but quieter than the AF on my Nikon 50mm 1.8 prime (wo/SWM). The HSM AF seems just as fast as my Nikon lenses. The build quality feels better than the Nikon 18-135; the zoom is smooth and solid. The first things I tested today were barrel distortion and OS functionality. Barrel distortion is present at the wide end on ALL wide-range zooms, but the Sigma controls it better. The Sigma has noticeably less barrel distortion at 18mm than my Nikon. This benefit of the Sigma is moot really, because barrel distortion of both lenses can easily be corrected with software. The OS functions very well, I can shoot hand-held down to 1/10th of a second with no blur. I will post again after I have time to do more testing.
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The lens is listed multiple times on Amazon.com with the only difference being the adapter ring which connects between the lens and individual camera model. In my case I bought the one which was listed with the Canon adapter ring. I do remember see ones listed for the Nikon....but, I don't remember if Sony was listed
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Sigma works with canon and Nikon but that's how you order the right one. I'm canon shooter and your question is for Nikon shooters. Sorry about not being more specific. Mm
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I have not had a chance to compare both but this sigma is the first non canon lens I have put in my bag. Have 6 different ones and the sigma is a great value. I have not regretted it.
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Really I don't know, because i bought the Adapter for a Nikon camera with a 60 mm macro, and it work perfect. Maybe you could need a ring adapter for your canon.
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I just bought this for my D80. It works perfectly fine. If you zoom in to the max then the built-in flash will cast a shadow (the lens itself is in the way) because you are so close to the object, in that case you need external lighting. No other 'issues' (this will happen regardless of what macrolens you use, so it isnt really an issue) that I have seen, great lens.
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The manual that came with my Sigma EM-140DG says it is compatible with "all type (sic) of EOS cameras."
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Anyone know if this will work with a Sigma EF-500? I can't see why one would need a Nikon-brand flash unit for it to work... anyone?
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I would ask DSLRKIT this question. I can't believe that anyone here has made the experiment unless they own both the Canon EF 70-300 is ultrasonic AND the Nikon 70-200MM F/4. Since DSLRKIT is both the vendor and manufacturer of the ring, you can contact them via normal Amazon channels. Please post their response back here so that others will know.
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Well, I don't use a light ring, but LIGHT is pretty important unless you're in the sunlight or bright daylight. I did get a light ring but it was far too bright for macros. So if you could find a nice gentle light-i'd go for it. Otherwise, plan on inventing some other light source. Unless, as I said, you're in daylight. The lens doesn't shadow the subject the way the macro built into the camera does. You can get far enough away that you won't leave a shadow. Hope that helps.
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I believe they make a Nikon version as well. The Canon version probably wouldn't work with Nikon because the contacts are different.
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I usually do an immense amount of research before purchasing a product because I despise having useless pieces of equipment around me when I could just do the research and purchase once. I absolutely love my Canon 100mm macro lens and have found no need to purchase the Canon ring flash. Unless you have money burning a hole in your pocket I would advise against purchasing a ring flash, plus if you want to experiment, there are a ton of DIY methods of putting together a ring flash just to see if the effect is worth the purchase of a more expensive unit. Another con of the ring flash is that it uses an inordinate amount of power. I like to carry the minimal amount of equipment as often as possible. I'm out in the desert hiking here and there. It gets hot and I want to use all my energy on the nature around me. I don't want to hear the voice in my head that complains of the extra weight of extra batteries, a bulky ring flash etc. I purchased a dedicated regular flash (model doesn't matter, just the best that you can afford) that I can use as a slave to the pop up flash that's on the camera. I find that with a few tweaks on my part, such as using a piece of paper or reflector to bounce color, darkness or lightness onto the subject can do the job I want just as well. Now git out there and use that 100mm macro! What have you been waiting for?!
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I know this flash is sold in two different versions, one for Canon and one for Nikon. I do not know which models of Nikon it is supposed to work with. I was NOT SATISFIED with the performance with a Canon, in fact it burned completely out the first time I tried to use it.