Re: [OM] New Camera - Sony digital noise processing for long exposures + camera/lens rental

[Chuck Norcutt]

Thanks.  I'll have to do some more study.

Chuck Norcutt


On 5/1/2014 10:56 AM, Ian Nichols wrote:
> On 1 May 2014 15:15, Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
>
> > Then what's the difference between a bias frame and a dark frame?
>
> As I understand it from the FAQ, a bias frame is recorded at the shortest
> available exposure time, so that only the electrical bias of the reading
> process is recorded.  A dark frame is recorded for the same time as the
> light frame, so the accumulated electrical noise during the exposure is the
> same.  Quite why the two are needed separately (since the dark frames must
> include the information in the bias frames) is not clear to me from my
> cursory reading of the thing, but that's what they mean.
>
>
> Ian
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