DSI Dark Library

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I was annoyed by the lack of a dark frame being applied to my DSI guider images.  While a dark-subtracted image means less noise and an increased sensitivity to guide on fainter stars, I found the need to cover the APO guide scope to take a dark inconvenient and impossible in an automated set-up.

I began creating a dark library in MaxIm DL.  This is configured to point to the calibration folder of master frames (biases, darks, flats), and "full calibration" is set for the guider CCD.  Much better.