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Some results from last night...
There is a lot of noise in the image, maybe I need to ground the enclosure. Or play with settings a bit (everything (Gain, exposure time) here was at maximum)
Calculated from this picture, Rubinar 8/500 works at f/6.7, 355 mm FL.
Star magnitudes are marked in red.
So FOV is ~ø1°.. maybe too smal for guider...
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