
I am another customer who received wrong Celestron 93419 T-ring. If advertised as a T-ring no other explanation, should it could be a standard 42mm threaded T-ring. The one I received measures a 47mm thread, which is totally wrong. Other reviewers point out that someone packaged the wrong parts for the Celestron and those parts should be recalled and repaired. didn't happen and I'm the victim of an ongoing bug. Correction! Guilty. The T-ring has 2 threads. The second inner has the correct 42mm thread and is perfect for a standard T-adapter. And the EOS side is perfect for a Canon camera. So I have to apologize for my initial mistake and upgrade my rating to 5 stars.

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