I've got -2.75 & -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 & 1.5 or 2 for the 1.75 eye?
64369
Because of the difference I would suggest buying 1 pair in each of the diopters you need and swapping out the lenses. For me the difference was only 1 point so I went up a half. They've worked out great.
64370
Two easy ways to solve this issue: There is a company called Platina (they also sell on Amazon) that sells the Corrective lenses separately so you can go that route if you like but it is more money. Second option: determine which is your DOMINANT eye and buy a pair with that correction. 99% chance you will NEVER notice the difference since your dominant eye controls most of your "vision"
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.
1635572
What I was told with 3.5X loupes is the focal distance should be at least 24-36". I must admit, I was "off" until I finally got myself to hold my head away from the patient at least that distance. Otherwise, everything is blurry. I'm also trying the 2.5x loupes now.
49299
You just need to know what your basic prescription u s and order a lens close to that. It worked for me as nd I am very nearsighted.
834168
The first number is the magnification and the second number is the lens diameter. The larger the numbers the more magnification and light gathering potential.
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.
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.
2033673
Michael, Not sure exactly how much 1.2 is, but the adjustment is fairly large on the right eyepiece both + and - As a test .. I set the right eyepiece at max (-) and used my reading glasses 1.75's in the eyepiece to bring the field back to normal focus, ie left in focus, right at max - and the 1.75's on the right bring them both back to even focus. They are great binoculars and they perform very well for the weight and compact size. Hope the info helps.
1469255
A 3 or 5x might be a bit much for that scope. A smaller 1.5 or 2x would be a better fit. All a Barlow does is increase your magnification. A 2x would double the magnification of whatever eye piece you use. Rule of thumb for maximum useable mag is 50 times the aperture. The aperture of the 127 is 5 inches. So the highest useable mag would be around 250x and that would be with perfect viewing conditions.
1213448
+3.5. And, besides: I tried them in a store and found that they they work superbly for adjusting on the fly between -6 and +3.5 correction (more or less). The optics seem excellent. As a fashion statement a bit awkward but hard to make the double lens system look better. The dial adjusters are discretely positioned and effective. I have no idea about durability.
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.
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
886612
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.
524634
I'd like to know, too. My two are quite different. One seems clearly to be at 5, and the other at 6.25.
15899
The lenses in these are not as sophisticated as the ones you would get from an optometrist. Consider the price! As a rule, I normally go down rather than up, so in your case I would get -3 (rather than -3.5)
1753205
Thanks for taking the time to reply. I suspected as much, so I have just been using one at a time. Nice to know that I needed to, and should continue to, in the wide angle range.
998686
Good question. The cardboard packaging says 2.5 and 6x. Looking through it and just guessing, I'd say 1.5 and 3x. The magnification is not very strong.
717780
Hello L., Unfortunately, these do only come in negative diopters. We do have -8 but not +8. Sincerely, Roy Lazarus Trivillage.com