Veil Nebula, a supernova remnant in constellation Cygnus.

This image is a wide field in region Cygnus.

Unfortunately the lens was not stopped down sufficiently and the stars in the corners show quite some abberations.

Acquisition Details

Lens: Sigma 135/F1.8 DG HSM ART
Lens Speed: F2.8
Filter: Haida Nano Pro UV-IR-CUT
Camera: Canon EOS Ra
Mount: Skywatcher Star Adventurer Pro
No Guiding
Light Frames: 157x30sec
Bias, Darks, Flats
Manual dithering every 20 exposures only in RA
Camera settings: ISO 1600
Bortle 4-5, No moon
Acquisition Date: April 15, 2021

Processing

Stacking: DSS
Imaging: PixInsight