With seeing deteriorating I switched to Calcium wavelengths and used an aperture stop of 72mm on the same scope to save some time. I was fighting the seeing and post processing came to the rescue with quite heavy deconvolution.
Dropping back to 60mm and a change of camera gave some cropped views of the main regions of activity.
Finally a view of the Ha full disk with the DS90, seeing wasnt great and the tuning is not quite there, but i'm pleased with the results given less than ideal conditions.
