Thread: coma corrector for F/5 Newton
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Old 18-02-2015, 12:44 PM
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Satchmo
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Join Date: Dec 2005
Location: Sydney
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The GSO one is great value but you need to extend the design focal plane by 19mm to optimise it - GSO didn't engineer the tube correctly . There's a massive thread on Cloudy Nights on the subject .
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