IC1805

 Posted: Nov 25th, 2025
Show astrometry on hover
NGC
IC
HD
Technical Info
Telescope/Lens: Askar FMA180Pro
Camera: ZWO ASI585MC Pro
Mount: Juwei 17-100
Guide Scope: 40mm
Guide Camera: Zwo asi120mm mini
Software: Siril
Accessories: Zwo asiair mini
Exposure:
35 x 180" ISO/Gain: 200 - Sv220
Orange zoneLight Pollution:
 Sankt-Peterburg, Russia
 Nov 22nd, 2025
1 h 45 m
69
First attempt at shooting with a cooled astro camera.
Resolution: 3806x2141 px
Scale: 2783 KB
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Comments

You are shooting with a gain of 200!!! Look at the graphs, that's a single gain, but you need HCG mode, which is gain 252. In that mode, the dynamic range is higher and the noise is lower. Anyway, congratulations on your first light.
26 Nov, 2025 Reply
Andrej_ka Replied to Oleg Novoselov
Check out the new graphs for the ZWO ASI585MC/MM cameras. The new HCG is at 200, replacing the old 252. All the changes are already in the software. Now, the dynamic range is also 12 stops instead of 11 on HCG.
26 Nov, 2025 Reply
Oleg Novoselov Replied to Andrej_ka
I didn't know, but I think I visited the new website.
26 Nov, 2025 Reply

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