thanks Paul.
I appreciate that there are differing opinions and as I said, it is not going to work for cameras with low QE and high read noise.
However, the original post is not based on any theory or opinion at all - the data is real data from an imaging session and I just presented it to show what I had actually measured.
Regards Ray
Last edited by Shiraz; 24-04-2015 at 11:07 AM.
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