I've got -2.75 &amp; -1.75 eyes. Should I round up or down to the nearest diopter? For each eye. 2.5 or 3 for the 2.75 eye &amp; 1.5 or 2 for the 1.75 eye?
47633
So you have the option to have a different strength for each eye? I did not when getting swim goggles and went with something in the middle, so in your case, either 2 or 2.5. I have one eye too strong, one not enough, but that does not seem to be a problem.
1531681
I can confirm that the best fitting sizes are #44 for the objective and #13 for the eye piece. The good folks at Cabela's let me try a few sizes on the display scope so that we could determine the best fit. While some have said that #14 should be the right size for the eye piece, I found that it was simply too loose. #13 was a tight fit, but was more secure than #14.
1749
The numbers 1.25, 1.5 etc refer to the maginification of the lens, the reading glass strength. The frames are all sized the same, for a unisex head shape. The temples are adjustable in length assuring a comfortable fit on a wide variety of head sizes. You'll need to know which power (+2.0? or +1.5? ect) you'll need for the lens of course. Thanks,
492744
Optimum Eye Relief (in) 12-20 SPECIFICATIONSMagnification 2 - 7X Obj. Lens Diameter (mm) 32 Exit Pupil Range (mm) 15.07-5.23 Field of View @100 Yds 60-16 Optimum Eye Relief (in) 12-20 Parallax Setting 50 yds. Click Adjustment Value 1/4 Adjustment Range 45 - 45 Transmission(%) Day/Night Weight (ounces) 7.50
1974953
I set the focus for one eye in the non-diopter lens with the center focus ring, then looking at the same spot with the other eye, adjust the diopter adjustable lens to focus. Once this is done, you should be able to focus for both eyes with the center ring. Each person may have to adjust to suit their own vision, but if only one person uses the binoculars, they shouldn't have readjust the diopter to focus with the center ring. Note your diopter position for the purpose of quickly realigning if someone changes your setting,
1652323
Her is two thoughts, 1st you can use a minus 1 and that may give you the rsange you want but I took the 2nd way which I purchased a -2, that way I can use the plus adjustment to get the proper adjust. Don't to purchase an eye cup for the corrective lens.
1216096
I have different sizes for different areas. I have been using the 1.0 for my face, 0.5 for around the eyes and 2.0 for body areas. I hope this helps. I actually did my face last night.
336773
Hi, I said I would check the use of the MaxTV glasses with my 4.25 Diopter contact lenses removed.I did, the focus adjustment did NOT go quite far enough to give a sharp focus. It was very close,but not quite there. If you used a two diopter, I don't think you would have a problem, even a 3 diopter would probably work. So for what it's worth. Ang, again, they work as I wanted them to.
65715
I ordered the mask for my girlfriend who is near-sighted. She gave me a copy of her prescription. Under the "Dist" part of her prescription, sphere is -8.5 which is the number I used when I placed my mask order. I am assuming "DV" is distance, and "NV" is near. If so, I believe you would enter the "DV" number. The mask worked great for my girlfriend. She said she could see better out of the mask than her glasses. Hope that helps, Brian H.
931872
I assume you mean 'in focus' for people with less than 20-20 vision. Yes, the rubber cap holding the glass lens will screw out quite a distance to adjust focus. It's good for about 1.75-2.00 diopter. The downside is there is no locking ring to hold the cap at your preferred focus point. (A dot of silicone sealant can hold it in place ) 2.25 diopter or higher? It won't screw out that far.
1357471
my old work has the 28-70 2.8... personally I took it out of my bag n use the old 35-70 2.8... that is much sharper then the 28-70 <-- might be the worst 2.8 ever... but they got it right with 24-70 sharp n wide... oh n weight less then the 28-70...
1211051
What I did was, using a set of metric vernier calipers measure the outside diameter of bothe the Ocular lens (eyepiece) and the objective lens. Then using the Butler creek measurement table, chose the size as close too or slightly smaller than that measurement. I too had issues with finding what I needed and I did have to surf about a bit, but I finally found a table that had all of scope cap sizes and measurements. Hope this helps
1652322
If I understand your Query correctly you need to wear reading glasses. Correct? The EOS Canon cameras have a pretty extensive range of adjustability built in. If you need something additional (rather unlikely) then match the diopeter number to the number you wear with your reading glasses. Such as +1.5 or +2.5...I purchased this adjustment lenses but actually found out the Canon had the correct adjustment on the camera for me around +1.75.So I don't use this piece.
759249
My brother has loan his 50 1.4 to me. I like. I may get the 24-70 2.8 - we get so many positives about it. Use the 24-70 indoors and the 4f lens where there is good light??Thanks for your suggestions.
1069237
Sharper by a discernible amount. Lighter! Faster focusing. 70-300 maintains a significant advantage in close focusing though. I have both lenses. If you want to shoot bugs and flowers, 70-300 is the way to go. Birds, sports, the moon, 75-300.
1177291
Depends on what your prescription is. The camera has a built in -3.0 to +1.0 diopter adjustment. You want to buy the one that will allow you to match your prescription.E.g. If you wear +2 prescription, get the +2 and dial it down by 1. You would only need the - if you have to go further than the -3 that is built in. However, I have found that I do not use the diopter. When I have my glasses off, the images on the LCD are blurry. So I shoot with my glasses or contacts, so I can still view the images on the LCD.Hope this helps you decide.Chris
2191696
That has never been a problem for me. I see fine. Would not need to adjust them. At first I thought that would be a problem but it was not. However I have 20 20 uncorrected vision.