Imaging recource: Night sky photography: Image stacking and other noise reduction methods compared

    Photographing a sharp image of the night sky generally requires that you increase your camera's ISO. There is really no way around this because you need to keep the shutter speed short enough to not have stars visibly streaking across the sky. While cameras are continually becoming much better at higher ISOs, you will still have noise to deal with in your images of the night sky. There are many ways to reduce this noise during post-processing and a wide variety of software solutions available, but how to determine which is the...
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