Re: NGC 7000 with CMOS camera
Robert Chozick <rchozick@...>
The problem is that you cannot use bias on a CMOS camera. Any exposure less than 3 seconds is not advisable (not an engineer so not sure why). So if you cannot use a bias frame on your flats you have to use flat darks.toggle quoted messageShow quoted text
On my CCD camera I took flats that were less than 1 second and used bias to subtract. I think all of these quirks of a CMOS have to be observed to get good calibration.
On 8/24/2019 8:47 PM, Robert Chozick rchozick@... [ap-gto] wrote: