2-inch to 1-1/4-inch Precision Centering Standard Adapter (17662)
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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.
#17662 - 2-inch to 1-1/4-inch Precision Centering Standard Adapter
The 2-inch to 1-1/4-inch Standard Adapter is our original secure fit adapter for 1-1/4-inch eyepieces, camera nosepieces, and SSP instrument telescope adapters.
See our #17663 Precision Centering Adapter for a non-marring compression ring fitting for eyepieces and camera nosepieces. However, for those desiring the additional safely of a dovetail groove, the #17662 is a better choice.
With a heavy wall and single thumbscrew lock, the #17662 is both rugged and easy to use. The bottom side flange features a machined brass registration screw to exactly match the notch on all TCF-S focusers. This allows rotational alignment each time the #17662 is removed and re-inserted into the 2-inch drawtube.
- Overall Outside Diameter: 2.38" (60mm)
- Outside Diameter (main body): 1.995" (50.7mm)
- Overall Height: 1.40" (35.5mm)
- Clear Aperture: 1.25" (31.8mm)
- Weight: 4.6 oz (135 g)
- Back-focus Usage: 0.25" (6.4 mm)
- TCF-S or TCF-Si focuser,
- TCF-S3 or TCF-S3i focuser with #17804 3-inch to 2-inch reducer,
- Any manufacturer's 2-inch focuser or receiver.