[mynameiscd (Andy)]

Its probably been asked a thousand times before but I'm not sure on what way to connect my camera.
I bought a Bintel coma corrector and tried my camera configuration in the picture and it seems worse with it than without it on.
I just use the 2 inch adapter on the camera but I've read all different ways to connect the camera and different spacings. One is 45mm, another is 75mm and another is 20 mm between the camera lens mount to the 1st element.
Anyone else here with a similar setup?
Canon 450d
Skywatcher 150mm Newt
Cheers
Andy