Cart 0


3" Drawtube Adapter To 2" - Precision Centering Collet Design (19825)

  • 12500

This item is out of stock but you can place an order now and we’ll ship when it becomes available.


Camera Adapters

How do you attach your camera?

Over the years, Optec has developed dozens of adapters and custom fittings for various cameras and mounts. While most astronomical cameras have a female T-thread mount, many of the larger chip cameras are now being offered with even larger mechanical interfaces, such as the relatively new 3-inch 24tpi female mount available on Apogee, SBIG, and a modified version on the FLI cameras. However, there are a variety of other mounts such as the STL 4-bolt mount.

We classify our camera mounts by the size and shape of the "telescope" side mechanical interface for a typical configuration. These mounts correspond to many of our astronomy products. For example:

  • OPTEC-2300 Camera Adapters for use with the Pyxis rotator, IFW Universal Mounting Ring, and Perseus 4-port parfocalizing rings.
    • The OPTEC-2300 circular dovetail mount is used for the TCF-S focuser and IFW filter wheel to allow easy connections from most any camera. If your scope or accessory is not listed, do not hesitate to call.
  • OPTEC-2380 Mounting Rings are threaded mounts for use with the IFW and MAXfilter systems. 
    • The OPTEC-2380 circular dovetail mount is used for the IFW Intelligent Filter Wheel and Perseus 4-port selector parfocalizing rings to attach most cameras and accessories.
  • OPTEC-3000 Dovetail Mounts for use with the 3-inch TCF-S3, Pyxis 3", and IFW-3.

OPTEC-3000 3-inch Mounts

3-inch Adapters for the TCF-S3", Pyxis 3" and IFW 3"

Optec 3-inch "Push-Fit" Mount

The OPTEC-3000 3-inch mounts "push-fit" into any 3-inch receiver including the TCF-S3, IFW-3 #17367 Rear Cover Plate, and Pyxis 3" rotator. Similar to a 2-inch eyepiece barrel or 2-inch camera nosepiece, the OPTEC-3000 series appears as a 3-inch nosepiece for convenient, yet secure mounting. All the OPTEC-3000 mounts have a machined dovetail to match the thumbscrews, setscrews, and other mounting hardware for all our 3-inch product line.

If your camera or accessory is not listed, do not hesitate to call. We are constantly adding new adapters to our catalog.

#19825 - 3" Drawtube Adapter To 2" - Precision Centering Collet design.

The #19825 Precision Centering Collect adapter allows equipment with a 2-inch drawtube adapter to be attached behind 3-inch OPTEC-3000 equipment including the TCF-S3, IFW-3, and Pyxis 3" rotator.
This adapter includes a brass machined centering collet includes a specially designed brass compression ring which self-centers when tightened.  To use simply twist the locking collar counter clockwise to allow insertion of your 2-inch eyepiece or camera nosepiece, then twist clockwise to tighten and center.  Especially designed for use with the TCF-S3 series focusers and Pyxis 3" rotators.


  • Outside Diameter:  3.75" (95mm)
  • Overall Height: 1.18" (30mm)
  • Clear Aperture:  2.01"  (51mm)
  • Weight: 6.08 oz. (172 g)
  • Compression Ring:  machined 360 brass
  • Back-focus Usage: 0.45" (11.5 mm)
  • Telescope Side Connection:  OPTEC-3000 Dovetail
  • Camera Side Connection:  2" Receiver
Camera-side Compatibility:
  • 2-inch Eyepieces,
  • 2-inch Camera Nosepieces,
  • Pyxis 2" camera field rotator,
  • NextGen and Lepus series telecompressors,
  • Any 2-inch 'push-fit' accessory.

      Customer Experiences



      Our Zero-Risk

      Telescope Upgrade Path

      For our customers who dream of expanding their horizons and gazing deeper into the night sky, we offer personalized telescope upgrade paths. Learn More> 

      Shop For...