I used the Swarovski DCA, which slides over the eyepiece. Once you are ready to take a picture you camera easily fits into the DCA. The DCB is the swingarm type adaptor. Do NOT try the DCB, it is far too bulky and really moves the camera when you are ready to take a picture.
Your camera needs to have a threaded lense and then you will also need to find the necessary step down rings. Doug at Cameraland was a huge help for me. His ads and contact numbers are on this site. I would highly recommend contacting him because there are a few modifications to make all the pieces fit together.
Roger