My camera field of view is approx 19.6 arcmin by 12.4 arcmin. I'm using a C8 with an f6.3 focal reducer which gives a focal length of 1280mm. The camera chip is 7.3mm by 4.6mm.

(I misquoted the field of view in my original post and gave the smaller field of view for a QHY5LII.)

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