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M 27

Evgeniy Osharov
1341564
Category:Deep Sky
Published:
1963
M 27NGC 6853
Resolution:
2659x2206 px
File size:
29285 KB

Photo description / processing

Imaging over August. Hydrogen from the city with the Moon, and 35 minutes from the countryside without the Moon. Oxygen from the countryside with the Moon. Star color from the countryside without the Moon.

Technical information

Telescope/Lens
Sky-Watcher 25012
Camera
ZWO ASI294MM Pro
Mount
MT-90M
Guide Scope
Sky-Watcher BK804
Guide Camera
ZWO ASI120MM
Accessories
CC SkyWatcher f4, zwo efw, optolong HORGB
Software
DeepSkyStacker, FITStacker14c, Fitswork4, Adobe Photoshop
Location
Красноярск, Россия

Light pollution

Orange, Bortle 6 zone

Date taken

Exposure

  • 42 × 300″ · ISO/Gain: 0 · H bin2 ·
  • 44 × 180″ · ISO/Gain: 0 · O bin2 ·
  • 24 × 30″ · ISO/Gain: 0 · R bin2 ·
  • 24 × 30″ · ISO/Gain: 0 · G bin2 ·
  • 24 × 30″ · ISO/Gain: 0 · B bin2 ·

Total exposure: 6 h 18 m

Photo versions

M 27
Updated
M 27

Aug 6th, 2025

6 h 18 m

Slightly brightened the existing photo, didn't redo anything. I've been looking at it for a long time, wanted to for a long time, but didn't want to spam. The periphery remained as it was, just became more noticeable.

M 27
Current photo
M 27

Aug 18th, 2023

6 h 18 m

Imaging over August. Hydrogen from the city with the Moon, and 35 minutes from the countryside without the Moon. Oxygen from the countryside with the Moon. Star color from the countryside without the Moon.

M 27
M 27

Oct 28th, 2021

7 m

A quick shot for fun, without guiding.

Show changes
Previous version
Current version

Comments

Ryjov Aleksey
Comment on photo: M 27from
Good day, Evgeny!
Great work!
I also have a ZWO 294 MM.
I have a couple of questions:
For bin 1 and bin 2 modes, do you need to shoot different darks?
What is the reasoning behind using zero gain?
Reply

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Evgeniy OsharovReply to Ryjov Aleksey
Comment on photo: M 27from
Hello! Yes, dark frames are captured exactly matching the lights, bin2 is not equal to bin1. Zero gain was part of an experiment; I observed different objects, thinking that with long exposures the signal would be cleaner, or rather, the noise wouldn't be as amplified. Currently, I'm shooting more with short exposures at 120 gain.
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