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.
766794
Blue lenses are excellent for all types of light. We currently have the +2.5 in stock but not the +3. Hope that helps.
1120065
They adjust for interpupillary distance at the hinge. The adjustment is so wide, I can't imagine them not fitting everyone. Hold them up to your eyes and move them in and out until the two circular images merge into one. The interpupillary distance is set. Then focus them until the image in the left eye is sharp. If the right image is also sharp, the focus is done for that distance. If the right image is fuzzy, adjust the diopter ring on the right eyepiece until the right eye is also sharp. From then on, focus is done with the big wheel in the middle. Easy peasy.
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.
1951964
In our line of work we are working on small die parts at close range. Roughly six inches away from the actual lens. Closer for the smaller lens. Roughly 2''... Everyone's eye muscles are different though.
1469254
I use the 3 and higher for imaging Planets, thet 2X can be used for doubling the power at the eyepiece. The 127 eq is a great scope you should have lots of fun. I had a C5 at one time loved it.
1683132
It depends on what you'd eyeglass prescription is. You should check with you Optomotridt and find out what your prescription is and then get the diopter closest to that.Rich Signorelli
918538
Actually the claimed eye relief is 17.5, which I find just about totally adequate for my use with glasses. So long as I take care and don't let them move around on my lenses, I can see the full field of view, which I haven't come close to seeing with any other optics in my life.
49300
You need to know your glasses prescription. If you're nearsighted, (need correction for distance sight your rx will be a negative number. The lenses come in 0.5 increments. For example I have a -3.75 correction. Since it is in between correction options I ordered a -3.50. (If your in between order the lesser strength). If you are far sighted the correction will be a +.(ie reading glasses). Hope that helps.
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
1340325
The first number is the power of the lens, that is how much it will magnify the image. The second number represents the diameter of the lens in mm. They work together to calculate a number called the "exit pupil" or "exit ratio". Take the lens size and divide it by the power to get this number. The higher the number, the brighter the image. For example, 10x50 will give an exit ratio of 5.0, 8x42 would be 5.25, 10x42 would be 4.2. In my opinion, the exit ratio is more important than the power. My favorite binoculars are 8x50 (6.25) but I also just bought 10x50 as a gift who is delighted with that configuration. Stay away from high-power binoculars. They, for me, are too hard to keep steady due to the high magnification. I hope this helps. -Norm
498047
Contact Splaqua. I have a smaller deviation in my correction , and in this situation it is suggested to go with the lower number. I know that Splaqua, and probably others, will help with getting the proper correction for each eye in circumstances that call for it.
107802
That equation is correct... it is called spherical equivalent. With a -3.00 sphere and -3.25 cylinder, your spherical equivalent is -4.50. Keep in mind this will give you pretty decent vision - good enough to see at a reasonable distance, but this will not be equal to a full spectacle prescription. I am an optometrist.
944546
Well it depends how far are you shooting in my neck of the woods. 3x9 is fine. I like 3x9 I leave Lt on 3 while walking in just in case I jump something.On 3 I can focus quickly on a target . The only time I adjust higher is when sitting once I spot something or when target shooting. I normally target shoot 50- 200 yards with no problem with 3x9 either way its a wonderful scope you be happy.
492745
No problems and glad I could help. I think you read the info incorrect though. "Optimum Eye Relief (in) 12-20 "
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.
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.