Been meaning to do this one for ages. Not easy because the background gas and dust can be easily lost in the light pollution and noise.

“The Iris Nebula, also known as NGC 7023 and Caldwell 4, is a bright reflection nebula and Caldwell object in the constellation Cepheus. NGC 7023 is actually the cluster within the nebula, LBN 487, and the nebula is lit by a magnitude +6.8 star, SAO 19158.”
Wikipedia

Object ID Iris Nebula
NGC 7023 / C4
Details Cepheus
Mag. 6.8, 18′ x 18′
Telescope 250mm f4.8 Newtonian
Camera Atik 460EX
Exposure(s) 10 x 180s each RGB 1×1
Capture APT
Processing Nebulosity, Photoshop