The ISO setting for digital camera's is widely misunderstood. The discussion about the best ISO setting for astrophotography most often is very confusing and anything between ISO100 and ISO3200 will be recommended. In this article I try to shed some light on this (;)) and come to a general conclusion as to what ISO value is the best for your camera.
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ISO has nothing to do with the camera's sensitivity to light. ISO in digital camera's explained and an explanation of the best ISO to use for your DSLR
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