Urban Canon EOS Ra M42 Nebula

Canon EOS Ra, 30 x 1 minute exposures ISO 2500

No in camera noise reduction or flat field.

Astro-Physics AP130 GTX , AP APFC. PMEII. No autoguiding.

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?