2-inch to 1-1/4-inch Compression Adapter

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

2-inch to 1-1/4-inch Compression AdapterThe  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 gloved hands.

The #17663 offers a precision machined 2-inch outer diameter to fit into the drawtube of the TCF-S or TCF-Si focuser or any 2-inch focuser.  A dovetail cut matches the three thumbscrews on the TCF-S while the 1-1/4"  inner brass compression ring offers a non-marring alternative for 1-1/4" eyepieces and camera or instrument nosepieces.  The adapter is self-centering for any 1-1/4" eyepiece or instrument nosepiece.

The 2-inch tube features an industry standard M48x0.6mm female thread for 2-inch screw-in type filters.  Removing the lobed  locking ring (shown in red) and the brass compression ring leaves a snug-fitting T-adapter with male M42x0.75mm threads.

Currently available with Red locking ring, Blue and Gold locking rings available August 2010.  Specify color when ordering.

Read Erik Wilcox's review of the #17663 Compression Adapter in the May/June 2010 issue of  Astronomy Technology Today.

Compatible with:
How to Order:

Contact any Optec dealer, call Toll-Free 1-888-488-0381, email, or click the button below to order directly through Paypal.

Contact Optec Sales to confirm color availablity.

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2-inch to 1-1/4-inch Compression Adapter 2-inch to 1-1/4-inch Compression Adapter2-inch to 1-1/4-inch Compression Adapter 2-inch to 1-1/4-inch Compression Adapter

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Other 2-inch Drawtube Mounts