[PeterO]

Hey all,

Pic below is a Flat through the scope, I,m assuming this to be vigneting, is there anything I can do about this?.

Details are 8" F4 newt taken with a 400d and Baader mpcc, I had to move the primary mirror up the tube by about 16mm and use a low profile focuser to achieve focus with the camera. any ideas or help would be nice.
The image has been stretched a far bit to make it more apparent.
Peter