About two weeks ago, I processed a monochrome Hα image of this interesting object on the border of Cepheus and Lacerta. Last Monday the sky unexpectedly cleared. I decided to spend the night on acquiring OIII data to create an Hα-OIII-OIII false colour image, where Hα is assigned to the red channel, OIII to the blue channel and a mix of Hα and OIII to the green channel. Although it stayed clear all night, I only used the images captured before midnight. In the area in the Netherlands where I live, the sky severely brightens from midnight to dawn because horticulturalists are then allowed to ignite assimilation lights. Although the used OIII filter has a bandwidth of only 4nm, the light pollution caused by the glasshouse horticulture severely affects the quality (signal-to-noise ratio) of the images. I'll post a separate message to illustrate the difference in sky quality before and after midnight.

What's striking in (false) colour images of this object, is the conical beam that crosses in front of nebulas in the background. Here this beam has a cyan hue in front of yellow/orange nebulas.

Exposure time: 16 hours, 10 minutes (141x 300" Hα, 53x 300" OIII) | Optics: Takahashi ε-180ED f/2.8 | Camera: ZWO ASI294MM Pro (B 2x2, G 120, T -15 °C) | Acquisition: ZWO ASIair Pro | Filters: Baader Planetarium Ultra-Highspeed | Mount: Astro-Physics Mach1 GTO | Location: Zoetermeer, Netherlands | Date: 27 & 28 October and 8 November 2021

Pre-processing in Astro Pixel Processor, post-processing in Adobe Photoshop.

Copyright: Maurice Toet

Image Description and Details : Sh2-132 or Lion Nebula, is a nebula of relatively weak emission located at about 10 000 light-years, at the border of Cepheus/Lacerta.
About 22 hours of exposure from Montreal, Bortle 9
Setup:
CEM70A
TSA102
QHY294MM
Chroma 3nm filters

Copyright: Jonathan Durand

Image Description and Details :

SH2-132 SHO 2 Panel Mosaik (Lionnebula)
One night with each Filter and Panel.
Zwo Asi 1600mm Pro
UNC8" F4 (800mm)
600mm Guidescope and the Zwo Asi120mm for guiding.
Mount SW EQ6 Pro.
All together 18h integration time
Subframes 600sec Gain 139 -15C .
Flats Darks Darkflats
Dithering
Software: N.I.N.A PHD Pixinsight Photoshop
Imaged in west germany under bortle 4 Sky.

Copyright: Frank Föhles

Image Description and Details :

Sh2 -132 is a large and very weak emission nebula in the constellation of Cepheus .
The stars responsible for the ionization of its gases are very hot and massive; in particular, two Wolf-Rayet stars were identified , known with the initials HD 211564 and HD 211853.

Processed by Santiago Rodríguez

Combination:

Image captured with Halfa and OIII filters of 5 nm. by Carlos Uriarte.
R:Halfa
G: 20%Halfa/80% OIII
B:OIII
Halfa astrodon 5nm filter (900 "x 91): 22.75h BIN 1
OIII astrodon 5nm filter (900"x50):12.5h
Total: 35.25h
CCD: Atik 460exmono
Telescope: Takahashi FSQ106ED
Ager, LLeida, Spain



Copyright: SantiRoHe

Image Description and Details :

Taken in the South of France , near Ventoux mountain

Newton 300mm F4 with the ZWO ASI6200, mix SHO and RGB stars

50 H-alpha subs @300s gain 100 and -15°C50

OIII subs @300s gain 100 and -15°C20

Blue subs @60s gain 100 and -15°C20

Green subs @60s gain 100 and -15°C20

Red subs @60s gain 100 and -15°C

Total exposure more than 9 hours


Copyright Information: Arnaud PEEL