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Optec - 1" Extender for OPTEC-2400 dovetail mounts, female to male.


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Availability: Available - Ships in 3-5 Days


Available - Ships in 3-5 Days

Manufactured by: Optec


The #17655 1-inch extension spacer mounts directly on to the OPTEC-2400 male dovetail and presents the same OPTEC-2400 male dovetail for attachment of any device with an OPTEC-2400 receiver.  This extension should be used a bit more back-focus is required.


  • Outside Diameter: 2.97" (75.4mm)

  • Overall Height: 1.3" (33.3mm)

  • Clear Aperture: 2.00" (50.8mm)

  • Weight: 4.6 oz (130 g)

  • Back-focus Addition: 1.0" (25.4mm)

Product Series

The OPTEC-2400 circular dovetail mount is used for the TCF-S focuser and IFW filter wheel to allow easy connections from most any telescope. If your scope or accessory is not listed, do not hesitate to call.  These adapters are required to fit the TCF-S and IFW 2-inch models to various telescopes. One end has the necessary fittings for the particular telescope and the other has a protruding ring with dovetail groove. The three #8-32 setscrews in the TCF-S or IFW clamp down on this ring.  Adapters are also compatible with the TCF-S.  Most mounts are made from high strength 6061 aluminum alloy and black anodized.

Additional Information

Name Optec - 1" Extender for OPTEC-2400 dovetail mounts, female to male.
Manufacturer Optec
Model 17655
Manufacturer Part No 17655