On Thu, 16 Apr 1998 13:47:48 GMT, "David Foy" wrote:

>I am nearsighted and the one neverending struggle I have with photography is
>getting good, critical focus. I know of three options: (1) continue
>struggling, squinting through the viewfinder with my glasses on; (2) buy a
>diopter, or (3) buy an eyepiece magnifier.
>My question is directed to people with experience with diopters or
>magnifiers. Do you have to constantly flip your glasses up and back down?
>Are these devices worth the trouble?
>I'm currently using a Nikon 801S, which has a good high-point viewfinder.

Of the above, I think the first two hold the most promise...
I found that replacing my camera-focusing-eye glasses distance
lens with one that provided vision optimized for the camera
viewing distance of about 3' not only helped with camera focus,
but helped with seeing well over a wider range of distances.
(Details are on my web page, under "I babble", "Four Distance
Glasses"). An alternative would be to add a slight diopter
correction lens to the camera eyepiece to provide better
focus for you of the viewing screen, with your glasses on.
If you have astigmatism, replacing the eyepiece with a diopter
that would allow not using your glasses would not provide a
sharp image if the camera is turned - and removing and replacing
glasses is unpleasant! The 801 (8008) has a sharp finder, unlike
some newer bodies, and it is worthwhile to provide a way for
your eye to focus sharply on its viewing screen.
David Ruether
http://www.fcinet.com/ruether