Orion recently released a new Thin Off-Axis Guider (TOAG) designed with DSLR's in mind. I had looked at others in the past but felt it was now time to give off-axis guiding a try. Some of the things that drew me to this guider:
Unpacking the guider it looked good and I like the finish. It comes with a number of attachments for use with different optical trains. The step-down ring (M48 male to T-threads female), was already attached so I removed it. The ring adapter design makes it easier to attached the camera to the TOAG. The Canon-camera compatible adapter is attached to the camera. Then this is placed on the TOAG and held in place with thumb screws. This avoids trying to twist the camera onto the adapter since the guider mount would be in the way.