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Old 27-11-2009, 12:06 PM
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leinad (Dan)
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Join Date: Feb 2008
Location: Perth, WA
Posts: 1,307
another question....

A quick question of gain/offset

In Nebulosity I found that
Gain 0 Offset 50 I get a Max value just on 1000. I believe thats right from what Craig Stark mentioned.

At bias 0.001 secs, this puts the histogram right to the left. Pity you cant zoom to view the histogram like MaximDL does.

http://i611.photobucket.com/albums/t...orion_test.jpg

Above was a quick stack (flat/bias calibrated and stretched) with a couple of 2min, 5min (Gain 0 Offset 55) and 1 10min (Gain 5 Offset 55).

I seemed to get similar results as well at Gain 1 Offset 110 compared against the Gain 5 Offset 55, though this wasnt good with the bias test shots.

If I understand this all correctly, I should find the right Offset with Bias frames then use that, and just boost the Gain with lights to get the best results with exp time.

Feedback welcome, thanks.
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