Re: Alternative Eyepieces?
rhill@LPL.Arizona.EDU
Thu, 2 Mar 1995 11:45:36 +0700
>
> Has anybody tried using camera lenses as eyepieces?
> I was thinking of 28mm or shorter. The big end is
> typically two inches across, like an expensive
> eyepiece (adaptor needed).
>
> The main advantage would be cost. Camera lenses are
> readily available, although 24mm wide-angle is getting
> a bit special. Compared to proper telescope eyepieces,
> you get a lot of quality glass for your money.
They would probably focus but not work well. Eyepieces are designed
for finite focus whereas camera lenses are corrected for infinite or
very long focus. It's like using a copier lens for a finder. If you're
not too critical it works O.K. but still the correction is not right
and there are lots of noticable abberations. You get a similar problem
when using microscope eyepieces on a telescope or vice versa.
-Rik