Starlight Instruments Feather Touch Adapter for C11, C14, CPC11, NexStar 11Item#: HN-STAR004
This adapter threads directly to the 3.29-16 "large thread" visual backs of Celestron SCT scopes.
No need to use the small threaded adapter and waste back focus..
Use with focuser FTF2015BCR
Dimensions & Specifications
Telescope Accessories Series
Starlight Instruments Adapters