On the evening of June 17, 2020, I took up a little extreme shooting of nebulae from the city. Extreme, since in conditions of strong urban exposure, the capture of diffuse nebulae without filters is very difficult. Fortunately, I am the owner of the wonderful Optolong L-eNhance filter, which only passes lines of hydrogen H-alpha, oxygen OIII and hydrogen H-beta. I had very little time for shooting, as the nebula quickly moved between the neighboring house and the tree. I am satisfied with the result, given the short shooting time – only 15 minutes. Also for shooting, I used a four-lens apochromat Meade 70 mm quadruplet apo.

M 17 Omega (Swan) nebula, June 17, 2020

Equipment:
-Meade 70 мм quadruplet apo astrograph
-Meade LX85 mount
-Optolong L-eNhance 1.25″ filter
-ASI ZWO 183MC camera.
28 frames per 30s, gain 365. Calibration with PIPP, stacking with Fitswork.
Location: Russia, Anapa, backyard.

M 17 Omega (Swan) nebula, starless edition

Orion is still available for observation in the evenings. I decided to shoot the Orion Nebula with second shutter speeds with 127 mm Schmidt-Cassegrain. In total, 1200 frames turned out, of which I manually selected the 521 best frame and stacked it. The capturing was carried out on an azimuthal mount Sky-Watcher AZ-GTi, field rotation compensation occurred when two stars were stacked to Fitswork.

The Orion Nebula, March 13, 2020

Equipment:
-telescope Celestron Omni XLT 127
-reducer Antares f\6.3
-filter Optolong L-eNhance 1.25″
-camera ZWO ASI 183MC
-mount Sky-Watcher AZ-GTi
Location: Russia, Anapa, backyard
Stacking 521 frames per 1 second with Fitswork, wavelets with Registax 6.

I also made bicolor, replacing the blue channel with green. Nevertheless, I like the original RGB version more, because the blue channel (H-beta) is still different from red (h-alpha) and green (O-III).
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Rosetta Nebula in the Unicorn. December 21, 2019

Equimpent:
-Samyang 135mm f/2.0 ED UMC Canon EF
-filter Optolong L-eNhance 1.25″
-camera ASI ZWO 183MC
-finderscope-guider 50 mm + camera QHY5III178m
-mount Sky-Watcher AZ-GTi.
35 frames per 120 seconds.
Processing: PIPP (calibration), (stacking). Scale 25%.
Scale 50% — link
Location: Russia, Anapa, backyard.