Quote:
Originally Posted by glend
Btw why shoot bias at 2.5sec? SGP shoots them at 0 seconds, basically dumps the idle sensor state. Maybe I have been doing it wrong.
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It's to do with the way the 1600 operates at exposures below about 2.3s. ZWO have mentioned this in their forums (see attached graph).
Post #25 on
this thread sums it up.
The only way to get a reasonable bias at the equivalent to zero exposure is to shoot slightly longer frames at >2.3s, figure out the slope of the line and extrapolate what the value would be if those exposures actually were 0s, then scale the difference in PI.
Best
Markus