Cygnus Milkyway

 Posted: Sep 2nd, 2026
Technical Info
Telescope/Lens: Canon 50mm F/1.2L
Camera: Canon R6a
Mount: Sky Watcher Star Adventurer
Software: Siril, PixInsight
Exposure:
1534 x 4" ISO/Gain: 3200 - Optolong L-Pro Canon EOS-R Clip in
 Sofrino, Russia
 Jul 25th, 2025
1 h 42 m
92
Resolution: 4080x3052 px
Scale: 7027 KB

Stacked in Siril, processed in PixInsight (SPCC >> histogram based on white balance readings in SPCC >> blurX >> noiseX at 50% >> MAS >> starX >> masks + curves)

Camera: astromodded Canon R6(a)
Lens: Canon RF 50mm F1.2L at fully open aperture (F/1.2).
Posted for my own reference so I won't be tempted to repeat this.

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Comments

And why so categorical that "there was no desire to repeat"? :/ What's wrong with it?
2 Sep, 2026 Reply
Ankorot Replied to Anastasiya Tretyakova
Very difficult processing to get rid of the background and noise — the fast lens causes strong vignetting, so I had to do background extraction twice, and even after that it's hard to tell the Milky Way in the center from its absence in the upper left (I tweaked it with a mask, which is cheating). The astro mod lets you see at least something, but this was more of a test of "what the fastest lens can do" than "we accumulated great frames with a great lens and processed them beautifully."

But the fact that a 50mm lens can deliver pinpoint stars across almost the entire field — isn't that a miracle?
And where it doesn't at the edges, that's because the sensor is slightly tilted after the surgical intervention.
2 Sep, 2026 Reply

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