Optec 2" to 1¼” Standard Adapter

Starting Price: $55.00
Price as Configured: $55.00
Brand: Optec / SKU: OP-17662

The  Optec 2-inch to 1-1/4-inch Standard Adapter is the original secure fit adapter for 1-1/4-inch eyepieces, camera nosepieces, and SSP instrument telescope adapters.

See Optec's #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)
Camera-side Compatibility:
  • 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.
Price as Configured: $55.00

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Adapter drawing Download
Adapter drawing