Re: Photos of shuttle

From: Bjoern Gimle (b_gimle@algonet.se)
Date: Sat Oct 14 2000 - 05:09:31 PDT

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    > ...Meade LX-10 (8 inch), ... just the camera or eyepiece projection too...
    > Dont forget, Im doing this hand-tracked. ... maybe try a snapshot,
    > ASA 800 film @ 250th ...
    
    Using 1/250 s, 5 m blur is about 1/6 of satellite speed, so you would have
    to hand-track within 15% of the angular speed (or 30 deg. of correct track
    angle).
    From old thumb-rules, if memory serves me right, ASA 800 and a 1/250 could
    use about f/22 for a bright, well-lit object. You could probably
    under-expose, perhaps to f/40. This means eyepiece projection (or zoom?),
    and with 8" an effective F.L. of 320" or 8 m. At a range of 400 km, this
    gives a scale of 1:50000, so it would give about 1 mm image.
    
    Correct me if I am wrong. I don't have such equipment, and haven't done this
    calculation before.
    
    
    
    
    
    
    
    
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