Thread: Taking Flats
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Old 01-11-2010, 02:30 PM
allan gould's Avatar
allan gould
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allan gould is offline
Join Date: May 2005
Location: Brisbane
Posts: 4,483
Look at your histogram while taking flats and make sure that your range of values is not clipped at either end of the histogram ie somewhere in the middle. I use 4 secs with my light box so that the effect of the camera shutter in the filter wheel does not become part of n inaccurate flat due to the time being too short and the shutter being part of the vignetting pattern.
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