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Great image Richard. Way better than I would normally expect to see from a DSLR.
So you took various images at various image lengths and plotted the resulting SNR (measured at the same spot on each image?).
I wonder if this result would vary with ambient temperature as sensor noise varies with temp.
Great work. I'll have to do the same with my Nikon D800e to see what the ideal ISO is for it.
Greg.
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