I shot the Pleiades last night (47x180" in the end) and have added 20 x flats, 20 x dark flats, 20 x bias and 20x darks. I've stacked in Deep Sky Stacker and processed in Pixinsight, using ABE, Photometric Colour Calibration and SNCR.
It comes out of Pixinsight looking like this.
There's a glow around the edge (you've probably spotted it!). I've tried a few things like DBE but it doesn't seem to make any difference, and it's there on a lot of my shots. I can reduce it in Photoshop, but never eliminate it. Any ideas why is it there in the first place? I'm guessing I'm processing badly and probably don't need bias and dark flats, or dark flats...or either? Maybe it's something else? Maybe the sky really does look like that?!
Any advice, gratefully received!
It comes out of Pixinsight looking like this.
There's a glow around the edge (you've probably spotted it!). I've tried a few things like DBE but it doesn't seem to make any difference, and it's there on a lot of my shots. I can reduce it in Photoshop, but never eliminate it. Any ideas why is it there in the first place? I'm guessing I'm processing badly and probably don't need bias and dark flats, or dark flats...or either? Maybe it's something else? Maybe the sky really does look like that?!
Any advice, gratefully received!
