A friend advised me to shoot with “unity gain” on the ASI071MC Pro, namely gain = 90 and offset = 65. I tried that, but there is so little signal in the FITS light files, even after 300 seconds on a bright target like the Orion Nebula, that PixInsight can’t find any stars for registration.
This is my first go with CMOS for deep sky imaging (and with SGP). I am used to DSLR. I understand that gain is essentially ISO. More gain is more signal boost. Not really sure what offset is? Also not sure what a good starting point is for gain and offset for general deep sky imaging, and whether I should be using the native ZWO drivers in SGP or something more generic?
Appreciate any thoughts.