"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 zoneLight Pollution:
Ekaterinburg Rayon Ozera Gluhoe, Russia
Sep 12th, 2024
5 h 10 m
1138
8
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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