I am still trying to master my 200mm f5 newtonian. The subs for this image were taken without a coma corrector with my 4/3rd sensor qhy163M. (I have recently adjusted the backfocus for my GSO coma corrector and have collimated my newtonian which was out a little bit -hopefully the next images I post will have nice round stars
)
I used Ha, and Oiii 300s subs and processed the mosaic in photoshop.
Cheers Kanga