Hi all I am curious as to why my master flats are so extremely dark. They cannot be evaluated without doing an STF. The raw values from the camera are in the 7000 ADU range which is appropriate for a Canon T3i 14 bit camera. The Master flat after Bias Calibration and Integration manually or through the BPP script has values in the 500-700 range. I am not sure this leads to any issues with processing but I am curious as what is happening to cause this?
Thanks for any insights
Carlos
