cary
Well-known
I have the problem that I can see well at medium to long distances with my glasses. I have trouble focusing with my Nikon FE. What eyepiece diopter should I use? Minus or plus?
Nikon FE Diopter Question
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philcycles
Established
Depends. I have a 2.75 reading correction and my Nikons have needed a diopter 0-that's right, zero.
Looking Glass Photo in Berkeley at Ashby and San Pablo has a lot of Nikon diopters to try.
john_s
Well-known
A starting value would be your shooting eye's spherical value on your optical prescription. If you see well at a distance with your specs, and you see well close up without them, it would be a minus value. As the reply above has suggested, I strongly recommend trial and error around that value. Preferably in not very bright light if possible because like your camera lens, the eye has to focus more critically in poor light because it's working at a wider aperture.
Dwig
Well-known
It should be noted that there is a difference in notation between eyeglass prescriptions and the markings on Nikon's (and most other) eyepiece diopters.
While both use "diopters" as their unit of measurement, they don't measure the same thing. Eyeglass prescriptions are marked with the strength of the lens itself. Eyepiece attachments are usually (always with Nikon) marked with the net total strength of the VF eyepiece lens plus the attachment.
Nikon's "blank" eyepiece attachment is plano glass (0d) yielding a system total of +0.5d (approx). Nikon's "0" attachment has an actual strength of -0.5d yielding a net system strength of 0d. With the "default" attachment the VF image appears to be 2 meters away, that is your eye must focus to 2m to focus on the image. With the "0" attachment, the VF image is projected at infinity and to see it clearly your eye must be able to see clearly at infinity.
If you intend to use the camera with your glasses on you should use a Nikon 0 attachment, as philcycles said in his post.
While both use "diopters" as their unit of measurement, they don't measure the same thing. Eyeglass prescriptions are marked with the strength of the lens itself. Eyepiece attachments are usually (always with Nikon) marked with the net total strength of the VF eyepiece lens plus the attachment.
Nikon's "blank" eyepiece attachment is plano glass (0d) yielding a system total of +0.5d (approx). Nikon's "0" attachment has an actual strength of -0.5d yielding a net system strength of 0d. With the "default" attachment the VF image appears to be 2 meters away, that is your eye must focus to 2m to focus on the image. With the "0" attachment, the VF image is projected at infinity and to see it clearly your eye must be able to see clearly at infinity.
If you intend to use the camera with your glasses on you should use a Nikon 0 attachment, as philcycles said in his post.
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