Hey everyone! I recently started to dive into the world of astrophography and have been loving it so far, I have a sky watcher adventurer GTI And a dslr. Theres a couple of things I’ve been running into that are causing me issues. First off, Before I had my star tracker I was taking one second exposures at 6400-3200 ISO and the background was completely dark, However now with these longer exposures with a star tracker (20-30 Second exposures) with an iso of around 400, after stacking and auto-stretching/background extraction with siril, I am seeing colored background (From what I presume is light pollution) How may I fix this? I’m using siril with background extraction and auto stretching. Another thing I’m uncertain of is, After I snap my photo, where should the histogram be? I don’t know if i’m under-or overexposing, Ill also attach a photo of my most recent orion nebula photo! I shot it at iso 400 with 20 second exposure.
Thank you very much for taking the time to read this! Have a great day :)📷 c791c5e2-106e-4a90-9c4e-88735f92d943.jfif
New to astrophotography! Trying to see how best to capture and edit DSO In bortle 8 class skies.
When you are shooting with such a wide angle lens, my first guess would be that there is some light source nearby that is causing the gradient. I’ve gotten them from things like running a little gas heater near my scope.
When I used a DSLR (Canon), I usually kept my histogram peak about 15% of the way from the left edge. What you want to avoid is saturating stars, as you lose the color and they start to bloat. So that little spike at the far right of your histogram is something to keep an eye on.
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