Trick: correctly pushing D800 to higher (ISO) limits

Started Mar 29, 2012 | Discussions thread
Astrophotographer 10
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Re: Trick: correctly pushing D800 to higher (ISO) limits
In reply to Dominique Dierick, Aug 26, 2012

Just nitpicking but what you are describing is not a bias frame but a dark frame.

A bias frame is a capture of the read noise and is done with a very short exposure with the lens cap on.

A Dark frame is the same ISO and exposure and ideally at the same temp.

Greg.

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