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I agreeImaging telescope or lens:TS-Optics 8" Ritchey-Chrétien Pro
Imaging camera:ZWO ASI 294MC Pro
Mount:Sky-Watcher EQ6-R
Guiding telescope or lens:TS-Optics 8" Ritchey-Chrétien Pro
Guiding camera:ZWO ASI120MM-S
Focal reducer:Astro-Physics Telecompressor CCDT67
Software:Luc Coiffier DeepSkyStacker, Robin Glover SharpCap, Pleiades Astrophoto PixInsight
Accessories:ZWO Off-Axis Guider, Lacerta LED Flatfield-Box
Resolution: 7136x4951
Dates:Feb. 15, 2019
Frames: 351x60" (gain: 120.00) -20C bin 1x1
Integration: 5.8 hours
Darks: ~105
Flats: ~50
Flat darks: ~50
Bias: ~250
Avg. Moon age: 10.03 days
Avg. Moon phase: 76.71%
Bortle Dark-Sky Scale: 4.00
Temperature: 2.00
Astrometry.net job: 2528060
RA center: 114.216 degrees
DEC center: 65.605 degrees
Pixel scale: 0.403 arcsec/pixel
Orientation: 95.133 degrees
Field radius: 0.487 degrees
Locations: Backyard, Vechelde, Niedersachsen, Germany
Data source: Backyard
I have really a strong issue with noise. This is NGC 2403, a wonderful galaxy in the M 81-group. The image was taken under a nearly 80 % moon and therefor lacks details. But the annoying noise is lousy, i dont know how to get rid of it. Tonight i will try imaging with the native focal length, maybe the reducer has something to with it (but i doubt it).
[Edit]: Image 'B' shows the noise blob by using the ExtractWaveletLayer-scipt in PI.
Due to high clouds i could not image last night, so i could not check if the CCDT67 is the problem.
The annoying 'noise blob' in the center. Can be better viewed in my previous image of M81.
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