Optec Inc. 2-inch to 1¼-inch Adapter: Secure and Versatile for TCF Focusers

Direct Fit for TCF Focusers: Designed to fit seamlessly into the 2” TCF focuser, ensuring a secure and precise connection.

Versatile Adapter: Ideal for 1-1/4-inch eyepieces, camera nosepieces, and SSP instrument telescope adapters, offering broad compatibility.

Durable Construction: Features a heavy wall and a single thumbscrew lock, combining ruggedness with ease of use.

Rotational Alignment: Includes a machined brass registration screw for exact rotational alignment with all TCF-S focusers.

Safe for Accessories: Offers a dovetail groove for additional safety, making it a preferable choice for secure mounting.

Easy Removal and Re-Insertion: Designed for hassle-free removal and re-insertion, maintaining alignment each time.

Alternative to Compression Ring Adapters: A reliable alternative to non-marring compression ring fittings, like the #17663 Precision Centering Adapter.

Professional Quality: Built to meet the demands of both amateur and professional astronomers, enhancing telescope functionality.

Specifications

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.

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)

Mechanical Drawing

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Optec Inc. 2-inch to 1¼” adapter fits directly into the 2” TCF focuser

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