Re: [OM] eyesight vs. focusing

[Winsor Crosby]

> Hi!
>     When you are nearsighted, but do not wear glasses, there is possibility
> that the pictures will not be sharp. The image you see on focus screen is
> sharp, but in real it is not sharp, because your sight is unsharp. You should
> wear glasses or contact lenses when you are taking pictures.
> Regards
> Marcin
>
> "Richard F. Man" wrote:
>
> >  Something I always wanted to ask. Lets say if I am slightly nearsighted. If
> >  I don't use the dioptic (?sp) adjustment, I can still get a the focusing
> >  screen "in-focus." But is the image really in focus in that case?
> >
> >  And what exactly does the dioptic (?sp) adjustment do? Does it affect the
>  > answer to the previous question?
> >
I do not think that is really true.  It would be true if the eyepiece 
worked like a telescope or microscope, i.e., without a screen. The 
lens projects an image on the screen.  Your eye then evaluates the 
sharpness of the image.  Even if your eye needs correction you can 
focus the camera accurately if you can see a sharp image on the 
screen.
--
Winsor Crosby
Long Beach, California, USA
mailto:wincros@xxxxxxxxxxx



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