Baader M68 4-in-1 Adapter
The Baader Planetarium Four in One (4-in-1) adapter will work with four different rear telescope mounts, and will adapt to a 2" back. The 2" side contains a locking collar made of feather/spring bronze with two large clamping screws for a very secure fit. The 4-in-1 Adapter accepts an M68 thread (Zeiss), a 2.7" Astro Physics thread, an M60 Vixen thread or an M56 thread to a 2" opening, which includes Celestron and Synta refractors and Skywatchers.
The 4-in-1 adapter can be used alone with the above listed telescopes, or in conjunction with, among others, the Pentax Adapter (BA-PXM84M68) which will convert the Pentax 100, 105, and 125 down from the large 84mm thread to a 68mm thread, and then the 4-in-1 Adapter will reduce the opening from 68mm down to 2" . This is important because it is significantly shorter in profile than the standard Pentax 2" Adapter, providing more focus range for visual, photographic, and CCD needs. Baader Planetarium Product Number: 4IN1