Optec 2" to STL 2156”x 24tpi Male Threaded Adapter

Starting Price: $55.00
Price as Configured: $55.00
Brand: Optec / SKU: OP-17667

The Optec 2-inch to STL thread adapter was developed to easily adapt the SBIG and QSI cameras and filters wheels for the TCF-S focuser.

By holding tight tolerances (+/- 0.003"), Optec has achieved a slip-fit that is second-to-none.  When used with the TCF-S focuser, the #17667 with its  precision machined dovetail cut exactly matches the three thumbscrews on the focuser's  drawtube.  By tightening the thumbscrews, the dovetail is drawn tighter to the face of the drawtube completely eliminating flexure.

  • Overall Outside Diameter:  2.45" (62mm)
  • Outside Diameter (drawtube body):  1.995" (50.7mm)
  • Overall Height: 1.34" (34mm)
  • Height of 2.156"x24 threads:  0.24"  (6.1mm)
  • Clear Aperture: 1.70" (43mm)
  • Weight: 1.4 oz (35 g)
  • Back-focus Usage: 0.10" (2.75 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.
  • M48x0.6mm threaded filters.
Price as Configured: $55.00

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Adapter drawing Download
Adapter drawing