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Baader Wide-T-Ring Fujifilm X with D52i to T-2 and S52

Baader Wide-T-Ring Fujifilm X with D52i to T-2 and S52

by Baader Planetarium
SKU BAA-2408331
CA$46.00 - CA$46.00
CA$46.00
CA$46.00 - CA$46.00
CA$46.00
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  • Connects Fujifilm X-mount cameras to telescopes
  • Features a wide S52 dovetail connection for maximum clear aperture
  • Includes a removable T-2 (M42x0.75) threaded insert for universal compatibility
  • Designed to significantly reduce vignetting on larger camera sensors
  • Modularly adapts to M48, M68, and the Baader UFC system with optional adapters
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  • Description
  • FAQ
  • Specifications
  • In the Box
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  • Warranty

  • Baader Wide-T-Ring Fujifilm X with D52i to T-2 and S52

    The Baader Wide-T-Ring for Fujifilm X-mount cameras replaces the restrictive T-2 (M42x0.75) thread with a modern, wide-aperture S52 dovetail system. This design eliminates the primary bottleneck in the imaging train, providing your camera's sensor with a wider, unvignetted field of view. While it includes a standard T-2 insert for backward compatibility, its true strength lies in the native S52 connection that supports more demanding optical systems.

    Beyond T-2: The S52 Standard for Fujifilm X-Mount

    The standard T-2 thread was designed decades ago for 35mm film and is simply too narrow for many modern, large-format camera sensors, causing vignetting. The Baader Wide-T-Ring solves this by using a much larger S52 clear aperture, ensuring the light cone from your telescope fully illuminates the sensor from corner to corner. This results in brighter, more evenly illuminated frames, especially with fast optical systems.

    A Modular System: Adapting to M48, M68, and the Baader UFC

    This T-Ring is the foundation of a fully configurable connection system. The removable T-2 insert and outer S52 dovetail allow you to adapt your Fujifilm camera to virtually any high-end corrector, focuser, or accessory for a rigid, wide-aperture connection.

    • M48 Connection: Use the optional S52/M48 adapter (#2958552) to connect to the common M48x0.75 "2-inch filter thread" standard found on most field flatteners and coma correctors.
    • M68 Connection: For large focusers, the S52/M68 adapter (#2458252) provides a direct, secure attachment to the professional M68x1 thread.
    • Baader UFC Integration: Attach directly to any Baader Universal Filter Changer using the UFC S52 dovetail camera-adapter (#2459119) to place filters as close as possible to the sensor.

    Baader Wide-T-Ring vs. Standard T-2 Ring: A Wider, More Secure Connection

    A standard T-ring's only function is to connect your camera via a narrow M42 thread, often becoming the single point of failure and vignetting in an otherwise high-end imaging train. The Baader Wide-T-Ring offers two distinct advantages. Optically, its larger aperture prevents the clipping of the light cone that darkens the corners of your images. Mechanically, the S52 dovetail provides a more robust and flex-free connection than simple threads, critical for maintaining sensor tilt and alignment.

  • What is the main advantage of the Baader Wide-T-Ring over a standard Fujifilm T-ring?

    The primary advantage is a larger clear aperture. Standard T-rings use the narrow T-2 (M42) thread, which can cause vignetting (darkened corners) on modern APS-C sensors. The Baader Wide-T-Ring uses the larger S52 standard to provide more even illumination across the entire sensor.

    How do I connect the Wide-T-Ring for Fujifilm X to an M48 thread on my flattener?

    You will need the optional Baader S52 / M48 adapter (#2958552). First, you unscrew and remove the inner T-2 ring from the Wide-T-Ring. Then, you screw the S52/M48 adapter into its place. This converts the T-Ring to a female M48 thread for direct connection to your flattener or coma corrector.

    Can I use the Baader Wide-T-Ring for Fujifilm X with the Universal Filter Changer (UFC)?

    Yes. This is one of its key design features. You will need the optional Baader UFC S52 Dovetail Camera Adapter (#2459119). This part attaches to the UFC base and allows the S52 dovetail on the Wide-T-Ring to clamp directly onto the filter changer for a secure, low-profile connection.

    Will this Wide-T-Ring help reduce vignetting with my Fujifilm X-T4 and a fast f/4 refractor?

    Yes, absolutely. A fast f/4 optical system produces a very steep light cone that is easily clipped by the narrow opening of a standard T-2 ring. By using the Baader Wide-T-Ring's native S52 connection (paired with corresponding S52 adapters), you provide a much larger path for the light to reach your Fujifilm X-T4's sensor, significantly reducing or eliminating vignetting from the adapter itself.

    What does the S52 interface on the Baader Wide-T-Ring for Fujifilm X do?

    The S52 interface is a system developed by Baader Planetarium that uses a 52mm dovetail clamp and corresponding threads. It serves as a modern replacement for the outdated T-2 thread, offering a wider clear aperture to prevent vignetting and a more rigid, flex-free connection for heavy cameras and accessories.

    I have an M68 threaded focuser. How can I attach my Fujifilm camera using this Wide-T-Ring?

    To connect to a large M68 focuser, you need the optional Baader S52 / M68 Adapter (#2458252). This adapter threads onto the S52 ring (after removing the T-2 insert), converting it to a female M68x1 thread. This allows you to attach your Fujifilm camera directly to professional-grade focusers for the most stable and widest possible connection.

  • Camera Mount Fujifilm X-Mount
    Inner Thread (Removable) T-2 (M42 x 0.75)
    Outer Connection S52 Dovetail
    Net weight (kg) 0.03
    Inner Diameter / Clear Aperture (mm) 41mm (T-2) / 38mm
    Outer Diameter 59.5
    Type of Adapter Camera Adapter
    Optical length (mm) 8.3

    • Baader Wide-T-Ring Fujifilm X with D52i to T-2 and S52

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