The Baader 3.3" SC Female to M68 male adapter has a 3.3" Schmidt-Cassegrain female thread on one side and a male M68 x 1 thread on the other. It can be used to connect accessories with M68 female threads to Schmidt-Cassegrain telescopes with 3.3" threads such as Celestron 11 - 14" SCTs and 9.25 - 14" EdgeHDs. It features a knurled ring for easy gripping. The optical length is 24 mm (Celestron measures from the end of the 3.3" thread on the camera side). When mounted by screwing on, the optical length is reduced to 11.5 mm. This adapter is a combination of the BA2408145 3.3" Celestron Nut and BA2458215 M68 - 6x6 T-Adapter with V-Groove. Specifications Optical length 11.5 mm Clear aperture 58 mm Outer diameter 81.5 mm Connection telescope side 3.3" SC female Connection camera side M68 x 1 male Weight 90 g SKU BA2458216
