Quote:
Originally Posted by Peter Ward
Not pain Paul, more puzzlement. I am very happy with the data out to the edge of the 16803...with FWHM’s under 1.9 arc sec.
I think Atmos is correct...CCDinspector is not perfect. I can literally change the focus 10 steps (about 1/1000th) in the same location and it gives me a different result.....as to why? A mystery so far.
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I found CCD Inspector to give slightly variable results. Mostly the same but yeah sometimes it would shift and you hadn't done anything. I think its good for an overall close collimation but eyepiece on a night of good seeing is the go for that final tweak.
Perhaps CCD Inspector is simply being influenced by seeing when you are getting that close. I know my CDK on a night of poor seeing is unable to be focused. That must affect CCDinspector calculations. I presume its using FWHM calculations to tell.
Greg.