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Nice Raymo. I have imaged NGC55 recently at Bretti and tried 10 minute guided subs at ISO800 - which looked great initially in test subs on the Canon screen but enlarged later in Photoshop showed slight star trails - so I have to reshoot soon. I think I will drop back to 3 and 5 minute subs next time. I try to resist using ISO1600 because of noise but you've convinced me to try it.
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