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Message: <blockquote data-quote="Expertneo" data-source="post: 242137" data-attributes="member: 19107">Hello!I am not a professional, but I made some research on sky photography. If you take long exposure photos from the stars you will see the movement on your pictures. 30 sec exp. time is a way too much, the starts will be lines, not dots... That is why people increase the ISO and lower the exposure time. I would use simply long exposure time and high ISO to get more data recorded on the sensor.To get the best performance, I advise you to upgrade to full frame camera since it is better for low light shooting. Upgrading to a very fast fisheye, Fullframe lens is also necessary to be able to record the best image.I hope it helps!</blockquote>