Noah Frere

@Terry I haven't stacked flats in a long time (if at all) so I don't remember if they worked for me, but the past year or so all of my files have stacked nicely, except for some h-alpha images that would not stack. But otherwise it's working fantastically.

I also am having trouble stacking h-alpha. I can get 5 to stack, but if I stack 10, they do not align correctly. I tried every setting I can think of in Affinity. Here is a solution that poster "Skylab" found, in the cloudynights forum: "This seems to be quite common. I have troubles stacking my Ha images in PixInsight too. At least in my case, the reason is that the strong noise in the green and blue channels (where there is almost no signal) interferes with the star-detection algorithm and leads to failures in registration. (This seems to be your problem too, at least part of it.) What I did to solve this is to ask PixInsight to use the super-pixel mode to deBayer, and then to extract the red channel of the deBayered color image. The resultant gray-scale images stack very well. This works because in the super-pixel mode, whatever in the green and blue will not contaminate the red. (Bilinear deBayering should also have this property, but I did not try it.)" Attached is a screenshot of my attempt at stacking ten raw files. BTW the OIII and non-filtered stacked fine. This makes sense to me, but I don't know if Affinity can extract the red channel and dismiss the others? -Noah Frere

@Newbee500 did you find a solution?

I have been loving Affinity, and it stacks unfiltered raw files beautifully, and even stacked my OIII images of M42 yesterday. But when I tried stacking the H-alpha images of M42, it ends up superimposing them so that I have a mess. Here's an example with just 10 images. I tried many different stacking setting options and different combinations of threshold and clipping, but ut made no difference. Any ideas?? Thank you in advance. - Noah

Hi all. I can stack nebulae fine, but decided to take a few dozen photos of Saturn to stack, with darks, but I can't figure any way to do it. Using Astrophotography Stack fails (I tried different staking methods). I can use Stack to successfully align the images, but there is no way to export that result into a RAW file to then use for Astrophotography Stack. I have googled and searched through this forum but can't find an answer, other than I believe it's not possible?? Thanks in advance. Noah

Hi there. I am also having stacking issues. Some of my fits files stack immediately and great, and some won't stack at all. I compared headers line-for-line and they were in agreement, so I don't know what the issue could be. To simplify things, I am just stacking five lights from the same camera. As far as I know my settings were the same but I suppose I could have changed something in the settings of ccdops (the program that captures the images) and am not remembering. I'll attach both sets of photos then we could see if it's on my end, or if the problem is inherent to the photo themselves. Would someone be willing to try this for me? M42 stacks for me, and M65 does not. Please ignore the names for the M42 files -- they were accidentally named "darks" but they are not. Thanks in advance. -Noah Frere m42_easter_darks001.FIT m42_easter_darks002.FIT m42_easter_darks003.FIT m42_easter_darks004.FIT m42_easter_darks005.FIT m65_clear_lights_only_5s001.FIT m65_clear_lights_only_5s002.FIT m65_clear_lights_only_5s003.FIT m65_clear_lights_only_5s004.FIT m65_clear_lights_only_5s005.FIT