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Originally Posted by avandonk
Doug you could try summing sets of images. With 76 images you could try summing every tenth say 1,11, 21 etc and then 2,,12,22 etc these six or seven summed images could then be median averaged to minimise noise. If you sum seven images it would be eqivalent to 7x30 sec exposure.
Bert
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Good onya Bert, I'd forgotten all about that technique seeing as most of us go for as long as we can without light polluting our images too much.
That is right Doug, plus the summing will also increase your bit depth as well, though only modestly with only sums of 7 to 10 images. When summing try a setting that prevents sigma clipping so your stars don't go max out.