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A good start Lars. The slow RC coupled to the relatively high QE of the 6303 makes a great combination. Cent A shows promising signs. M83 as others have mentioned has a magenta cast over the image. Taking a quick look at the histogram reveals the culprit with the green channel being clipped. Use the histogram to your advantage. Given the low arcsec/pixel ratio your set up delivers, oversampled data is the result. Hence, you'll obtain much improved results through deconvolution (or smart application of it such a iterative blends). Looking forward to seeing more once you get the rig dialled in.
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