Stacking without Darks and Flats
Stacking program, astrometric (plate) solver, fits file viewer
Brought to you by:
han59
Menu
▾
▴
I am very new to Astro Photography. I just took 100 exposures with my Sony camera. I thought 7 sisters was very easy enough.
I just ran through the ASTAP stack program. I am getting a bad red in the stacked TIF file that is not in any of the single exposures. Can someone please tell me if this is because I only stacked lights?
Thanks
Last edit: Dennis Husman 2023-12-10
This looks like a typical light pollution problem. The sky is at one side lighter. If you stretch a single image in ASTAP you can see it as well.
We are all suffering more or less of the same problem. Ideally you work from a dark site with hardly light pollution (and no bright moon) but that is in most cases not possible. You can remove it from the image by the "equalize background tool" in tab pixel math 1. Try it. If it doesn't work for you tell me.
Attached your single image highly stretched.
Han
Last edit: han.k 2023-12-10
Thanks Han
I was really hoping this was a problem with lights. I can fix this with a shroud, and get to a darker site. (I am hoping) I had a couple street lights that are too close to me.
I'm very new to this, I just bought the SkyWatcher 250P goto a couple months ago, and wanted to try some pictures. I think the light is coming through the truss.
I've ordered a shroud form my telescope and will give it another try when I get my telescope wrapped.
It was just weird to me that a single picture turned out great! Then stacked the light pollution came out.
Thanks again! I will try again. :)
Last edit: Dennis Husman 2023-12-10
It is also possible that one or more of your image is more effected. Have a look to the background values as reported in tab "lights". If one or more has a higher background value then inspect that image by double click on it. If it is poor remove it from the stack by unchecking/remove/rename to *,bak.
Success, Han.