ASI533MC subs displayed in red

stubblejumper

Even after Debayering, aligning and combining in Pixinsight, I get a red image. It should be green because the Bayer matrix is RGGB. When I extract the channels, almost all of the signal is in the Red channel. The Blue and Green channels are almost blank. If I Debayer with GRGB, I get a green integrated image and there is a more evenly distributed signal in the channels. It wasn't like this before I updated ASIair Pro. The display on my tablet has red. It used to be B+W. What is going on here?

Tech@ZWO

Can you check the Auto White Balance? Is it same behavior no matter "on/off"?

stubblejumper

I turned it on but it isn't a solution to the main problem. My integrated image is red. It should be green if the Bayer matrix is RGGB. I can get a green image if I use GBRG in Pixinsight's DeBayer function. But when I extract the channels for M31 or M45, there is little difference among the channels. Recombining them results in a relatively colorless image. My best guess is that something changed in the latest ASIair release. I've given up and gone back to a Canon 6D which was my mainstay camera before I bought an ASI1600mm and ASI533MC. The 1600 works well but not the 533. I live in a Bortle 6 area and need to use light pollution suppression filters. Right now I am using an Optolong L-Pro. Could it be causing the red color? I don't know.

wvreeven

Can you debayer a raw light and then inspect the histogram? You should see 3 peaks: one for R, one for G and one for B. Do you? And, to be absolutely sure, you didn't put an R, Ha or SII filter in the light way, right? I am pretty sure you didn't but it never hurts to make absolutely sure 😅