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Yep same settings is good. What's your max exposure time. If its good seeing then you might get away with 1/10 sec. Try it at 1/25 and see how you go. Don't do any cropping before processing them in registax. You can take them as jpegs, but if you have a bmp setting use that for less compression of the images. Dark frame???, depends on how much noise your camera generates. 1/45 sec - personally I wouldn't worry about it. Once you've taken them, you can load them into Registax and view each image and accept or discard it from the stacking process. More on that later once you've collected a few.
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