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Chris. There is probably nothing wrong with your bias or dark frames. With DSLR data, clipping of the light frames is sometimes a consequence of subtracting bias from darks flats and lights and then subtracting dark from lights (dividing by the master flat). That is, the traditional CCD work flow.
Depending on the image set, it's better to bias subtract your flats only, then subtract your master dark from your lights, like so.
Signal = (light - dark) / (flat - bias)
This issue is not new in PI when using DSLR data, occasionally.
Last edited by rcheshire; 10-11-2017 at 04:40 PM.
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