Grant – Nice. This Celestron

Forums Telescopes Dew heater straps and shields Grant – Nice. This Celestron

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Nick James
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Grant – Nice. This Celestron astrograph seems to perform very well at f/2.2 although your H18 isn’t that much of a test for a thing that is supposed to have a 40mm diameter well corrected focal plane! Are you going to try it with a bigger sensor? I’d certainly be interested to see how it performs in real life with a full-frame (36x24mm) sensor.