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.