M81-M82

 Posted: Feb 23rd, 2026
Show astrometry on hover
NGC
IC
HD
Technical Info
Telescope/Lens: Sky-Watcher 150/750
Camera: ZWO ASI 585 mm Pro
Mount: homemade harmonic mount
Guide Scope: SVBONY 60/240
Guide Camera: ASI120MM mini
Software: Siril. Photoshop. StarNetv2. PixInsight 1.8
Accessories: Asi mini. Sharpstar 0.95x
Exposure:
330 x 120" ISO/Gain: 200 - L-Optolong
120 x 120" ISO/Gain: 200 - R-Optolong
120 x 120" ISO/Gain: 200 - G-Optolong
120 x 120" ISO/Gain: 200 - B-Optolong
Green, Bortle 4 zone:
 Kasimov, Russia
 Feb 5th, 2025
23 h 0 m
12
Resolution: 3711x2019 px
Scale: 7624 KB
Well, this is my first experience working with a mono camera and filters. The weather wasn't great, of course—freezing temperatures, poor atmospheric transparency, and light pollution.

There were sooo many different versions, but I chose this one as the best in my opinion. I struggled a lot with the stars; they looked really scary—bloated and fuzzy. I wanted a hydrogen explosion in the Cigar, but apparently not this time :))

I processed it on my main monitor, which shows black as true black, not glowing black or semi-black. I decided to check it on another 4K monitor with an IPS panel, and oh horror—in the mid-tones, you can see a green tint, and the image looks completely different.

So, keep in mind what you're viewing it on :)
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