Starlight EC35-505-3CR---End Cap 3.5" with 3.0" Compression Ring openingThis end cap fits the Feather Touch 3.5" focusers and has a 3.0" compression ring ...
Starlight Adapter to 2" Schmidt Cassegrain Thread for 2" FTF20.. Focuser... best use with FTF2015BCR Scope specific adapter attaches to the 2"-24tpi thread on the rear cell of Schmidt-Cassegrain/Maksutov-Cassegrain telescopes