3-inch Extender Tube Mount

#17816 - 3" Drawtube Adapter To 3" Extender Tube For 3" Instruments

3-inch Extender Tube Mount

The #17816 3-inch Adjustable Extender Tube adds anywhere from one to three inches of back-focus to your optical setup by making use of V-grooves that are set at multiple points along the body of the tube. The back of the tube presents an OPTEC-3000 dovetail to attach to any product with an OPTEC-3000 receiver, including the TCF-S3, IFW-3, and Pyxis 3" rotator.

  • Outside Diameter:  3.56" (90.4mm)
  • Overall Height: 4.5" (114.3mm)
  • Clear Aperture:  2.65"  (67.3mm)
  • Weight: 12.48 oz (353.8 g)
  • Back-focus Usage: 1-3.1" adjustable (25.4-78.7mm)
  • Telescope Side Connection: 3" Adjustable V Groove
  • Camera Side Connection::  OPTEC-3000 Receiver
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.

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