Imaged areas around this a lot for HOYs but never this actual part. First time back using the MPCC without the LP filter this time to avoid internal reflections. Stars are better at 3 corners but top right still off – probably focuser alignment.

Object IDIC1396
Elephant’s Trunk
Telescope250mm f4.8 Newtonian, MPCC
CameraAtik 460EX @-15°C
Baader Ha, OIII filters
Exposure(s)10x300s each Ha, OIII
Darks, flats, bias
ProcessingAPP, Photoshop