Adapter M68a to 2"/SCTi – for Celestron

If your corrector has got a male SC thread, it should fit without problems. The "i" in UNFi stands for internal or female thread, and UNF is the thread standard. This thread may be better known as 2" SC-thread, as it is the standard thread used on the smaller Schmidt-Cassegrains. If you need a male thread, there is also Baader 2"/2" Inverter Ring with 48mm filter thread # 1508020

Yes, you can attach this item http://www.baader-planetarium.com/en/baader-2%22-safety-kerf-nosepiece-with-2%22-filter-thread.html