M45 Pleiades

 Posted: Mar 6th, 2025
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IC
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Technical Info
Telescope/Lens: Samyang 135mm T2.2
Camera: Nikon D850
Mount: AT 1
Software: DSS, PixInsight, Ps
Exposure:
458 x 20" ISO/Gain: 1600
Green zoneLight Pollution:
 Velikiy Novgorod, Russia
 Dec 17th, 2023
2 h 33 m
1028
Reprocessing of old material from 2023
Resolution: 3066x1989 px
Scale: 4284 KB
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Comments

Nastya, why is the ISO so high? 1600
7 Mar, 2025 Reply
Anastasiya Tretyakova Replied to Victor G Burmistrov
Because the exposures are only 20 seconds each.
7 Mar, 2025 Reply
Victor G Burmistrov Replied to Anastasiya Tretyakova
With my Samyang lens at f/2.2, 20 seconds, and ISO 1600, the image is severely overexposed—almost completely white. Does this depend on the level of light pollution in the area?
7 Mar, 2025 Reply
Victor G Burmistrov Replied to Anastasiya Tretyakova
Or to bring out the dust, should the frame be overexposed?
7 Mar, 2025 Reply
Anastasiya Tretyakova Replied to Victor G Burmistrov
No, it shouldn't be overexposed, though it does depend on the light pollution zone! I shoot in blue and green zones and never set it below 800. It can range from 800 to 2000.
7 Mar, 2025 Reply
Victor G Burmistrov Replied to Anastasiya Tretyakova
Understood
7 Mar, 2025 Reply
Very cool!
29 Mar, 2025 Reply
Anastasiya Tretyakova Replied to Andrey Gapulenko
Thank you very much!!!
29 Mar, 2025 Reply

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