[APML] Proper Use of Varimagni Finder

["Kevin Wigell" <kwemail@twcny.rr.com>]

I just received a Varimagni finder for my Olympus OM-1. I bought it to
improve my ability to focus when I have the OM-1 mounted piggyback on my
scope and using a 50 mm or telephoto lens (I use a KEF for focusing through
the scope). I've been having great trouble getting good, consistent focus
with lenses on the camera.

I'd appreciate any advice for using the Varimagni to focus the lens. I've
practiced with it during the day on terrestrial objects, but focusing on
stars is completely different, as we all know. BTW, I have a Beattie screen
in the camera. Do I just focus with the Varimagni at its highest
magnification setting (2.5x) until the stars look the sharpest, or is there
more to it than that? Normally I photograph one f/stop higher than the
lens's wide open setting.

Thanks,
Kevin Wigell


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