Quote:
Originally Posted by glend
I had a chance last night to test image with Ray's chart as a guide. Having previously been imaging at Unity Gain settings I had become familiar with the camera's behaviour at that setting. I quickly noticed that it is going to take a lot more subs at say 35" and Gain 50 than subs captured at 60" at Gain 139 (Unity).
Not suggesting Ray's chart is incorrect, far from it, but user of the numbers should take into consideration the influence of Gain reduction, and greater sub numbers required for data build, as a trade off for the ultimately increased dynamic range.
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If you're capturing 60" at unity then you should be taking considerably longer subs at Gain 50 than 35", longer than 60" in fact.