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Subject: RE: OFF TOPIC: Film Camera
From: Richard Tabbutt
Reply To: mapug@shore.net
Date: Wed Apr 03 00:10:23 1996

Thanks for your tip on the Olympus focusing screen. However, I think you meant
to specifiy the 1-8 screen rather than the 1-7. The 1-7 is a
microprism/clear-field type, whereas the 1-8 is a very fine all-matte screen
designed purposely for astrophotography up to focal ratios of f100. For very
high magnification beyond f100, Olympus recommends screen 1-12, which is a cross
hairs/clear-field type. According to their literature, one should " first
correct your diopter using a diopter correction lens or Varimagni Finder so that
each line of the double cross hairs can be seen clearly and separately. Then
bring the Spacemen into focus." Cute!

Contrary to common belief, all Olympus OM-series screens 1-1 through 1-14 are
still in production, and can be obtained from mail-order dealers for about $32
apiece. They fit all OM1,2,3,4 cameras.