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Old 16-05-2018, 02:10 PM
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Geoff45 (Geoff)
PI rules

Geoff45 is offline
 
Join Date: Jul 2006
Location: Sydney
Posts: 2,631
So all we need now is a scope with 15m focal length to get 1" per pixel. However you'd probably want to use it in Chile somewhere where the seeing is good, 0.5". Let's go for a 30m focal length at, say, f/4. Only 7.5m aperture--about 300"
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