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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.

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

SKU BAA-2408190
Original price $67.00 - Original price $67.00
Original price
$67.00
$67.00 - $67.00
Current price $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
  • Non-marring brass compression ring secures eyepieces without scratching
  • Single-piece machined aluminum body for rigidity and precise alignment
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  • 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: The Advantage of Baader's Non-Marring Design

    Unlike basic adapters that use a simple thumbscrew to hold eyepieces, this Baader adapter incorporates a non-marring brass compression ring. When you tighten the lock screw, the internal ring gently and uniformly clamps down on the barrel of your 1.25" accessory. This provides a more secure, perfectly centered grip that prevents scratches and gouges on your expensive eyepiece barrels—a common issue with standard set-screw designs.

  • 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. The brass compression ring design provides a much more secure grip than a single thumbscrew. It makes full contact around the circumference of the eyepiece barrel, distributing the clamping force evenly and preventing heavy eyepieces from tilting or slipping.

    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 non-marring compression ring, which protects your eyepieces from damage, 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)
  • Baader Planetarium Warranty