[aljo2345]

Hi,

Requesting advice from anyone that may be able to assist me. I am getting severe coma-like halos, off centre when trying to image with my Mak 90mm coupled with my Nikon D750 at primary focus via the native T-adapter. Any advice that may assist in resolving the problem would be greatly appreciated. Please excuse the poor focus and tracking in the attached image-test pics.

thanks very much Alex.