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3-inch To OPTEC-2400 Dovetail Mount


The #17805 3-inch Drawtube Adapter allows many Optec 2-inch series instrument to be attached behind the larger 3-inch series.  For example, with this adapter a 2-inch TCF-S series focuser can be mounted on the camera side of a Pyxis 3" rotator.

Similarly, a 2-inch IFW could be mounted directly behind a TCF-S3 series focuser.

  • Outside Diameter:  3.45" (87.6mm)
  • Overall Height: 1.19" (30.2mm)
  • Clear Aperture:  2.05"  (52mm)
  • Weight: 6.08 oz (172 g)
  • Back-focus Usage: 0.13" (3.3mm)
  • Telescope Side Connection:  OPTEC-3000 male dovetail
  • Camera Side Connection::  OPTEC-2400 male dovetail

Telescope-side Compatibility:

  • Optec TCF-S3, TCF-S3i, TCF-Lynx3 focuser,
  • Pyxis 3" #17745 or #17747 rotator,
  • IFW-3 with #17367 rear-cover plate,
  • Perseus 4-port selector with #19880 receiver adapter.

Camera-side Compatibility:

  • TCF-S, TCF-Si, TCF-Lynx focuser,
  • IFW Intelligent Filter Wheel,
  • Any OPTEC-2400 dovetail receiver.