Home › Forums › Variable Stars › A beginner…. › Bias and CMOS
15 November 2020 at 11:47 pm #583377
Dr Andrew Smith
If you have a CMOS camera be aware it has two possible problems with bias frames. First, amp glow is not linear with time. Two CMOS can have different readout modes for very short exposures such that extrapolating “long” dark frames of different lengths back to zero time does not give the same value as a “short” bias frame.