M33 - test shot from a f/4 Newtonian

[riklaunim]

Bresser 200/800, Explore Scientific coma corrector, Omegon camera, Baader Neodymium 2" filter, around 100 x 60s frames. Focus is almost there and some reflections sadly went in as well even after some gradient removal (Graxpert):

 

I do have street lights from bottom left/right angles (and some bandpass filters don't have such issues) so I'm guessing it's hitting the inner OTA wall and reflecting to some extent.

And before M33 was in the field of view I did shoot M15, which looks way better (although at the 60s the core was already a bit overexposed):