Coma correction - Can I expect more?!

[mbalkham]

I've using a Baader Mark-III MPCC Coma Corrector and using my Canon 6D on my Skywatcher 200p. Still experiencing coma at edges of the frame (or is this some other effect?). So simple question is can I improve upon this? And if so how?

Example image attached (excuse the processing!).

[Daniel-K]

it seems to be slightlyworse on the left maybe due to flex?

is the 6D full frame?

[mbalkham]

Yes it's full frame. Forgot to say that image had been cropped the original was equally effected left and right. 

[Daniel-K]

if its equally affected then maybe the CC isnt covering the whole chip. it could be a spacing issue.

[mbalkham]

Thanks Daniel. Assuming it is spacing am I right in thinking that means I need more distance between sensor and corrector? If so what's the best way to achieve this?

[Daniel-K]

http://www.firstlightoptics.com/adapters/baader-t2-delrin-spacer-ring-set.html

 

you could try these.