Urban Canon EOS Ra + WO SpaceCat51 Eta Carina region

Canon EOS Ra, 20 x 1 minute exposures ISO 2500

No in camera noise reduction or flat field. Image reduced approx 2x

William Optics SpaceCat51, 75% crop

Image registration, stack, dynamic background extraction and masked stretch in PixInsight.

Final curves in Photoshop CC 2020

Can you see all 26 grey scales above?