Quote:
Originally Posted by MrB
Pardon my ignorance, I have never used CCDI, but I thought the idea was to use a light box or similar, like taking a flat field?
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CCDI is used to measure stuff in a pic you've taken. It doesn't actually do anything except diagnose your pic. It is supposed to tell you things about how round your stars are, focal plane tilt, focal plane curvature, FWHM, vignetting and more.
Geoff