2-inch to Standard SCT thread Adapter (17665)

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. #17665 - 2-inch to Standard SCT thread Adapter. The 2-inch to SCT thread Adapter is our original secure fit adapter for 2" x 24tpi  SCT male telescope thread.  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 #17665 with its  precision machined dovetail cut exactly matches the three thumbscrews on the focuser's  drawt