Celestron T-Adapter with SCT 5, 6, 8 with 9.25, 11, 14, Black (93633-A) The Celestron T-Adapter attaches an SLR or DSLR camera to a Schmidt-Cassegrain telescope for prime focus photography Threads on to the rear cell of Schmidt-Cassegrain telescopes T-threads accept camera brand specific T-Ring (sold separately)