A couple of tips on the T-Ring tips:
1) I had a Celestron T-Ring which happen to be low grade material, so the $20 T-ring did not hold my DSLR to well into my telescope. There was a major risk of DSLR crash. I did some research and I found that B&H sells a Kowa T-Ring that it is superb for about the same prices, so if you read this message on-time buy the Kowa T-Ring.
2) I marked my T-Ring with a little bit of white-paint on the point where the DSLR connects, so at night it is easy to find the spot and save a few seconds and potentially it can save you from dropping the camera.