To connect your SLR or DSLR camera body to a Celestron SCT telescope you will need a Celestron #93633-A t-adapter + a compatible t-ring. To attach to the telescope, simply remove the visual back from the OTA and replace with the T-adapter. Then screw the t-ring on to this..You can then attach the DSLR camera body to the t-ring in the same way as a camera lens.
As no eyepiece is used, this is what we call prime focus photography , and is the preferred choice of most imagers
SCT t-adapter / t-ring bundles can be purchased HERE from Northern Optics