"Question mark" NGC 7822 and SH 2-170 (Little Rosette)

 Posted: Sep 16th, 2024
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NGC
IC
HD
Technical Info
Telescope/Lens: Samyang 135mm f/2.0 ED UMC
Camera: ToupTek IMX571
Mount: МТ-120
Guide Scope: Искатель 50
Guide Camera: T7m
Software: NINA, Pixlnsight, ФШ
Exposure:
62 x 300" ISO/Gain: 152 - Optolong L-Ultimate
Orange, Bortle 6 zone:
 Ekaterinburg Rayon Ozera Gluhoe, Russia
 Sep 11th, 2024
5 h 10 m
1260
Resolution: 3234x3808 px
Scale: 5079 KB
Once upon a time on Astrobin, someone took a picture like this and called it "The Question Mark" or "Question Mark." I liked the composition, but I had nothing to shoot with, so now it worked out.
For the shot, I placed an aperture in front of the lens, achieving a relative f/2.9-3.
The stars became neater.
I tried the Laida 7nm and Optolong L-Ultimate 3nm filters, and the latter won unconditionally, so I shot with it. Even though they say it's not for fast systems, the relative aperture probably does its job.
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