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Old 13-10-2019, 10:56 AM
Martin Pugh
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Martin Pugh is offline
 
Join Date: Nov 2006
Location: Canberra, Australia
Posts: 1,339
I used CCDAP so the exposure was automated and I did calibrate the flats using a bias so I can try eliminate that and switch to darks only.

The issue with an f2.2 scope and a back illuminated sensor is that it has to get really quite dark to avoid saturating the sensor, even with a minimum flat exposure length of 1sec. Consequently, flat fields are littered with trailed stars. Nonetheless, the combination algorithim gets rid of them and the flats ‘look’ really good, but are not currently working as I described so work to do and an EL panel is on the way.

The QHY600 does not use ISO.
Cheers
Martin
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