Overscan and flat frame acquisition with SGP

Main Sequence Software Sequence Generator Pro (SGP) QHYCCD QHY163M Acquisition Calibration Deep Sky
1 reply•104 views
Eric Cauble avatar
Eric Cauble avatar
I've been leaving the "remove overscan area" unchecked in the QHYCCD driver in SGP, because it sometimes turns off between sessions and my frame sizes don't match between lights and calibration frames. I think this is due to using a 168C and a 163M on the same computer.

When I take flats and I'm aiming for a mean of  22k is it factoring in that black border from overscan?
Thanks,

Eric C.
Eric Cauble avatar
Eric Cauble avatar
I figured out a solution to my own question, I should have thought of it sooner! I'll just turn on crop overscan when I run the flats calibration wizard, then turn it off when I actually take the flats, and use the same exposure times.  smile
Related discussions
Flat troubles with dark corners
I'm having trouble with using flats to get flat images with a full frame sensor and 2 inch filters. Due to the large size of the of the sensor and the size of the image circle, the corners on my shots are significantly less illuminated than the c...
Discusses flat frame issues and sensor considerations relevant to flat calibration.
Nov 9, 2020
MasterFlat Overcorrecting the Lights during calibration
Hi again, This problem of overcorrection has been a hot topic in many forums and I couldn't find any good solution after testing the various recipes read on those forums (exposure time of the flats > 5 seconds - I have been doing flats with al...
Addresses flat frame calibration problems and potential overcorrection during processing.
Dec 21, 2020