Tried stacking frames for a nebula photo and got a mess instead

I spent about 3 hours last Saturday shooting the Orion Nebula with my old DSLR and a cheap tracking mount. Stacked 120 frames in DeepSkyStacker like the tutorials say, but the final image came out with weird green halos around every star. I figured out later it was because my darks and flats were taken at the wrong temperature, like 15 degrees off from the lights. Now I gotta reshoot everything when the weather clears up, which might be weeks. Anyone else had stacking go wrong from something dumb like calibration frames?

2 comments

2 Comments

seanjohnson1mo ago

Yeah swapping the order of my calibration frames fixed the same issue for me.

charliehill1mo ago

A warm sky and a cooler camera did the same thing to me once.