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I'd suggest that you plan to use a high total focal
length for this. Eyepiece projection is one way if you have the projection
tubes. At short focal lengths you will be mis-matched on your exposures. Either
the moon will be over-exposed or Sat will be under-exposed. High magnification
at long fl's will get the two objects close to correct exposures. If you can
design your system to get you 1/2 to 1 sec exposures that will be best. Use the
hat-trick for your shutter to minimize vibrations For your instrument, an
16-18mm eyepiece with a 120mm projection distance will calculate at 1/2 sec
exposure for a 200 speed film; 1 second for 100 speed
film.
Bobby Middleton
"To think that the eye could evolve by natural selection seems I freely confess absurd in the highest possible degree" CHARLES DARWIN http://www.koyote.com/users/bobm/astro1.htm
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