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Good telescope for planetary imaging?
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04-12-2017, 03:41 PM
Merlin66
(Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,904
My rule of thumb is the optimum hi-res focal ratio is 4 to 5 Times the micron pixel size, for a 5 micron pixel camera this would indicate f20 to f25.
A x2 PM would fit the bill.
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