Thread: Birds homebrew 13.1" newtonian (merged)
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  #53  
Old 25-01-2006, 11:56 PM
ausastronomer (John Bambury)
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Mark/Anthony

I am a little confused here , If the mirror is distorted by the cooling effect, is not its "out of figure" state the same for visual and photographic purposes ? Or are there other factors involved here as well ?

CS-John B
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