Another very early image created in April 2011 when I was learning how (not) to take flats and calibrate properly. The image has a hot spot in the centre and corners where the flat frames have not corrected the images, probably due to the camera being moved between the images and flats being taken.
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| M101 - 10 x 120s subs |
Even when I reprocessed the data and cropped the image, it is still pretty dreadful. Lesson learned: don't change the image train before all calibration frames are taken.
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| M101 restacked with different reference image, cropped and reprocessed |
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