
2-inch to Standard T-thread Adapter (17664)
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. #17664 - 2-inch to Standard T-thread Adapter. The 2-inch to T-thread Adapter is our original secure fit adapter for M42 x 0.75mm T-thread cameras requiring a male T or T2 screw-in threaded nosepiece. By holding tight tolerances (+/- 0.003") Optec has achieved a slip-fit that is second-to-none. When used with the TCF-S focuser, the #17664 with its incorporated precision machined dovetail cut exactl