After a HOYS-CAPS session added narrowband. Rat’s head in there?
No more MPCC and stars are much sharper at the edges.

Object IDNGC 2264, Christmas Tree Cluster
Details2019-01-29
Telescope250mm f4.8 Newtonian, MPCC
CameraAtik 460EX @-20C
Baader Ha, OIII, SII filters
Exposure(s)10x300s 2×2 each
Darks
CaptureAPT
ProcessingNebulosity, Photoshop
SHO colour mapping