u/WormsAreBack

My favorite event to witness for sure. Spent a while learning a lot of new processing techniques, ended up with this photo.

Image details and rough processing steps on my astrobin

https://app.astrobin.com/i/0n3exf

I went back and decided to process some of my old data. I took this set in Cherry Springs about a year ago. It was noticeably different processing this image compared to my new telescope, as this one is with a normal camera lens.

Astrobin Link: https://app.astrobin.com/i/3fancn
13 Hours of Exposure
Nikon D750 Camera
Nikkor AFS 200-500 Lens
Al55i Mount
Zwo30mm mini guide scope
Asi220mm mini guide camera
Edited in Pixinsight and Photoshop
BlurX - Color Calibration - Star X - Dynamic Background Extraction - Noise X - Histogram Transformation - Curves - PS edits

My first image with a telescope. It really is a huge upgrade from my camera lens, I’m incredibly happy with it. This is also my first time using Pixinsight so the processing I’m sure is not perfect but I’m excited to be learning more.

Zwo FF65
Nikon D750
Al55i Tracker
Asi220mm + 30f5 guiding
~5 hours with 3 minute exposures
Processed in Pixinsight + PS
Color Calibration BlurX StarX Dynamic Background Extraction NoiseX Curves PS edits
Taken in a Bortle 4

This is driving me crazy, recently the past couple times I’ve gone out shooting there is a distinct circle shadow in the center of my images. I’ve tried literally everything, redoing stacks, testing single images, stacking without calibration, with calibration, in DSS and siril. It’s always there and I cannot figure out why. I figure at this point I’ve ruled out software issues. I always shoot with a dew heater on my lens so I don’t think it’s that. It only started recently too. I’ve included pictures of what it looks like, both gradient removed and just stretched, singles and stacks. I’ve spent days testing and redoing every little thing. I’m convinced it’s related to my setup but I have zero clue what to even do to attempt fixing this issue. I’ve included an image I made prior to this issue that used the EXACT same processing technique as I’ve been using that has shown no issue. I also ruled out environmental factors I believe as two of these problematic sets of images were taken in different locations
I use a Nikon D750 and Nikon 200-500 f5.6 Lens
https://imgur.com/a/t8MMo6q