Hello from a new member. You've all been very helpful to my journey already.
I've been dabbling in AP for while but started to get serious about the hobby in the last few months. I practice every clear night the skies give me (few and far between this winter)
I'm trying to understand the source of the vingetting and imaging halo I've been getting. Here's me setup:
ST80 (Meade Adventurer 80mm, stock)
SVBony UHC filter
1.25" to EOS adapter
APC-C Canon DSLR
The attached image is a single sub-exposure, 90s ISO3200. I have heavily processed and color-adjusted it in photoshop to highlight the red/purple halo around the edges. The fall-off beyond the halo is typical to-be-expected vingetting (from the 1.25 focuser, yes?). I am in SW Ohio under bortle 4/5 skies.
Is this a typical issue? Will flats alone resolve or mitigate this problem? Is it possible these are from stray reflections inside the cheap adapter, filter, or the OTA itself?
Thanks for any assistance,
Edited by waykreid, 31 March 2020 - 12:25 PM.