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Old 14-03-2020, 02:23 PM
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Merlin66 (Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,907
Nothing to do with crop factor....
Most (all?) FOV calculators work on pixel size x number of pixels.
Depending on the reducer spacing the magnification factor may vary.

Do a plate solve on your image to confirm the size (or just estimate using say CdC with the image sitting next to it)
The attached CCDCalc FOV shows your camera with/ without reducer.
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Click for full-size image (FOV ed80.JPG)
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Click for full-size image (FOV ed80_0.63.JPG)
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