01-10-2017, 09:30 PM
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Registered User
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Join Date: Jan 2015
Location: Sydney
Posts: 355
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Quote:
Originally Posted by Merlin66
David,
The optimum f ratio for detailed planetary/ solar is from f25 to f30.
The PM/ barlow should bring you close to these numbers.
Nothing to be gained from 2” fittings, the target image is so low.
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Cheers!
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