2-inch to 1-1/4-inch Precision Centering Compression Adapter (17663)

Description Adapters for 2-inch Focuser Drawtubes 2-inch O.D. Adapters to fit the TCF-S and other 2-inch focusers. Each of our 2-inch Drawtube adapters are machined to tight tolerances for a smooth, snug fit into the TCF-S and TCF-Si 2-inch focuser drawtubes. A dovetail cut directly matches the thumbscrews on the TCF-S for a secure fit.  By tightening the thumbscrews, the adapter is drawn tightly into the focuser's drawtube. These 2-inch drawtube adapters will usually fit very well into other manufacturer's focusers as well.   Contact Optec for any 2-inch drawtube adapter not listed here. #17663 - 2-inch to 1-1/4-inch Precision Centering Compression Adapter The  2-inch to 1-1/4-inch Compression Adapter is our improved version of the #17662 1-1/4" adapter.  This new version features a solid brass compression ring with machined grooves to hold 1-1/4" eyepieces firmly without slippage.  A mere 1/8th turn of the upper locking ring tightens and loosens the 1-1/4" bore for easy use with glov