Cassiopea. Canon R6 astromod, 50mm F/1.2L. 3hrs

 Posted: Mar 1st, 2026
Technical Info
Telescope/Lens: Canon 50mm F/1.2L
Camera: Canon R6a
Mount: Sky Watcher Star Adventurer
Software: PixInsight
Exposure:
731 x 15" ISO/Gain: 01000 - Optolong L-Pro Canon EOS-R Clip in
 Sofrino, Russia
 Aug 30th, 2025
3 h 3 m
11
Resolution: 4366x2691 px
Scale: 6234 KB
F/1.2. Maximum aperture open.

Near Moscow. The Milky Way is not visible to the naked eye. It's surprising that anything showed up in the photo at all.
The stars at the edges have "spikes" parallel to the frame edges—this is due to the slightest sensor tilt (a few microns) and the very fast F/1.2 aperture. Had to crop.

Processing:
PixInsight. WBPP failed with an out-of-memory error (too many files, not enough RAM). Had to process using the LN file (LN reference generation).
Crop. Graxpert BGE. BlurX, NoiseX, HT_Stretch, StarX.
Starless: Graxpert BGE, red mask.
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