Skip to content

Language

Country

Baader Adapter - 1.25"/2"" w/ T-2 Thread

SKU BAA-2408190
Original price CA$67.00 - Original price CA$67.00
Original price
CA$67.00
CA$67.00 - CA$67.00
Current price CA$67.00
Price Match Policy!
  • Reduces a 2" focuser to accept 1.25" accessories
  • Features an external male T-2 thread for direct camera attachment
  • Strong grip with 2 screws and a bronze clamp, ideal for the heaviest eyepieces or cameras
  • 48 mm filter thread for 2" filters on the telescope side
Backordered
Availability Info
Qualifies for FREE Shipping in Canada on orders over $500.
Vignetting Calculator

Will your imaging train vignette?

Check which filter and adapter sizes clear the sensor with the Baader Adapter - 1.25"/2"" w/ T-2 Thread, and how much light the corners lose.

Check vignetting
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty
  • Baader Adapter - 1.25"/2" w/ T-2 Thread

    The Baader Adapter - 1.25"/2" w/ T-2 Thread solves a common equipment problem by integrating a high-quality 2" to 1.25" visual reducer with a standard T-2 photographic thread. This single, precision-machined component allows you to switch seamlessly between using your favorite 1.25" eyepieces and attaching a T-2 threaded astro-camera or DSLR T-ring to any 2" focuser.

    A 2-in-1 Adapter: 1.25" Visual and T-2 Photographic Connection

    This adapter eliminates the need for stacking multiple components, which can introduce flexure and alignment issues into your imaging train. For visual observers, it functions as a premium 1.25" eyepiece holder that drops into any 2" diagonal or focuser. For imagers, the external male T-2 thread provides a direct, secure connection point for prime-focus astrophotography, creating the shortest possible optical path.

    Beyond Simple Reduction: A Strong Bronze Clamp

    Unlike basic adapters that hold eyepieces with a single thumbscrew, this Baader adapter uses a bronze clamp tightened by two screws. Baader rates this grip as ideal for the heaviest eyepieces or cameras.

  • How do I use the Baader 1.25"/2" Adapter to attach my DSLR camera?

    To attach a DSLR, you will need a T-ring specific to your camera's brand and model (e.g., a Canon EOS T-ring). You simply thread the T-ring onto the external T-2 threads of the Baader adapter. The entire assembly then slides into your telescope's 2" focuser like an eyepiece, allowing for prime-focus photography.

    Will this Baader Adapter securely hold heavy 1.25" eyepieces?

    Yes. Baader describes the grip of its two screws and bronze clamp as ideal for the heaviest eyepieces or cameras.

    What is the advantage of the T-2 thread on this Baader 1.25"/2" Adapter?

    The integrated T-2 (M42x0.75) thread is a universal standard in astrophotography. It allows you to connect a wide range of devices directly to your telescope's 2" focuser, including:

    • DSLR cameras (with a corresponding T-ring)
    • Dedicated CMOS/CCD astronomy cameras
    • Off-axis guiders and filter wheels with T-2 connections

    Can I use filters with the Baader 1.25"/2" Adapter?

    Yes, this adapter is threaded on the bottom (telescope side) to accept standard 2" (M48) astronomy filters. This allows you to use your 2" nebula or light pollution filters with your 1.25" eyepieces or a small-chip imaging camera.

    Will this adapter add significant length to my optical path when imaging the Moon with my 8" SCT?

    This adapter is designed to be as low-profile as possible to minimize added back-focus. For an 8" SCT imaging the Moon, reaching focus should not be an issue. Its primary function is to adapt the connection type, not to extend the focal path, making it a nearly universal fit for most reflector and catadioptric telescopes.

    Is this Baader adapter better than the simple 1.25" adapter that came with my telescope?

    For most users, yes. The two main advantages of the Baader adapter are the bronze clamp with two screws, which Baader rates for the heaviest eyepieces, and the integrated T-2 thread, which provides a versatile connection for astrophotography that stock adapters typically lack.

  • Net weight (kg) 0.14
    Screw Type 2x M4 clamping screws
    Compatible Brands Astro T-2, UNC, Baader Planetarium, Celestron
    Clamping System Screw clamps
    Inner Diameter / Clear Aperture (mm) 31.75 (1¼")
    Outer Diameter 55
    Type of Adapter Nosepiece, Eyepiece Clamp, Filter holder, Reducing Adapter
    Optical length (mm) 9
    T-2 Part # 15
    Inner Connection (eyepiece/-camera-sided) ø 1¼" (31.75 mm)
    Outer Connection (eyepiece/-camera-sided) M42 x 0.75 (T-2)
    Inner Connection (lens sided) M42 x 0.75 (T-2), M43, M48
    Outer Connection (lens sided) ø 2" (50.8mm)
    Telescope-side connection 2in Nosepiece (with M48 filter thread and T-2 thread)
    Camera-side connection 1.25in Clamp (with external M42x0.75 (T2) thread)
  • Baader Planetarium Warranty