I’ve been slowly learning SGP and implementing it on my system. I have a SBIG STL-11000m, Pyxis Rotator, etc on a Williams Optics Megrez 90 scope, carried around by a Skywatcher Az-EQ6 mount.
Last night when setting an imaging sequence running (Ha session on the Running Chicken) the focus routine kept getting confused, and I’m almost sure was trying to use one of the sensor defect columns in the weighted average for the FWHM calculation, which was giving some weird results. The focus run went to about 220% or something before completing and ran for about 10 minutes (10 Second exposures through a 6nm Astrodon Ha Filter, and about a 30 second download time for a 1:1 binned image).
I snapped a quick screenshot with my iphone but as you can see a weird focus curve - which as the routine progressed se-sawwed a bit. Is there something I can do to calibrate this type of behaviour out? Ie a master dark for the image or something ? tolerance settings, longer focus frame integration time?
Critical focus is paramount to getting a good image, and I’d obviously like to get it sorted.