Quote:
Originally Posted by multiweb
The donut is a dust mote in the imaging train (not the camera or nosepiece tough, it's much farther) that wasn't flat fielded.
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You got me thinking with this post. I would have thought that at that size the dust would be fairly close to the CCD. I used the calculator I posted a link to to do some testing. I found that with my WO FLT110 and the QHY-9 camera for a dust donut that was as wide as the CCD sensor the dust would only be
62.861mm from the CCD. Am I not understanding something?