Nice one Chris. You do need to use more than 1 dark frame. People can say whatever they like about the number of darks that are required but more is definitely better. Almost the same is better with the lights. Sometimes with a DSLR you are better to do more of somewhat shorter images to reduce the noise levels and increase the signal. That said you must have a good 350 as the amp glow for a 15 minute exposure at 800 ISO is negligable and the noise levels are good. Colour and guiding is also very good. Well done Mate.
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