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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.
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.
Baader Planetarium M48a Change Ring with S48a ring dovetail
Baader Planetarium M48a Change Ring with S48a ring dovetail
Baader Planetarium M48a Change Ring with S48a ring dovetail
Baader Planetarium M48a Change Ring with S48a ring dovetail
Baader Planetarium M48a Change Ring with S48a ring dovetail

Baader Planetarium M48a Change Ring with S48a ring dovetail

par Baader Planetarium
UGC BAA-2958595
$61.00 - $61.00
$61.00
$61.00 - $61.00
$61.00
Égalisation de prix!
  • Converts M48 threads to the Baader S48a dovetail standard
  • Enables rapid, secure attachment and detachment of accessories
  • Provides a rigid, non-rotating connection to prevent camera tilt
  • Designed for minimal optical path length to preserve back focus
  • Part of the Baader M48 Quick Change System
En rupture temporaire
Alerte de retour en stock
Info disponibilité
Admissible à la livraison GRATUITE aux USA pour les commandes de plus de 350$.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • M48a Change Ring with S48a ring dovetail

    The Baader M48a Change Ring with S48a ring dovetail is a core component of the Baader Quick Change System, engineered to convert standard M48 filter threads into a fast, rigid, and repeatable connection. This ring allows for the rapid swapping of cameras and accessories without the risk of thread binding or altering your critical rotational alignment, streamlining your imaging sessions.

    Secure M48 Connections for a Modular Imaging Train

    For astrophotographers, threaded connections are a common source of flexure, tilt, and frustration in the dark. The Baader M48a Change Ring solves this by replacing the M48 thread with a secure S48a dovetail, which locks into the corresponding Baader M48 Quick Changer (#2958548) for a solid, repeatable fit.

    This system is designed for modularity. By attaching a Change Ring to each of your M48-threaded components—such as a camera nosepiece, an off-axis guider, or a filter drawer—you can instantly switch between different imaging configurations without the tedious and error-prone process of unthreading gear in the field.

    • Zero-Flexure Interface: The S48a dovetail provides a wide, rigid contact surface that prevents the tilt and sag common with single-point threaded connections, ensuring your optical train remains perfectly aligned.
    • Preserves Back Focus: The ring is designed with a minimal optical path length, allowing it to be integrated into tight imaging trains without consuming your available back focus.
    • Repeatable Orientation: Once locked in, your camera and accessories return to the exact same rotational angle every time. This is critical for maintaining flat-frame calibration and consistent framing across multiple nights.

  • What is the primary purpose of the Baader M48a Change Ring?

    The Baader M48a Change Ring is designed to convert an accessory's male M48 thread into the female S48a dovetail. This makes the accessory compatible with the Baader M48 Quick Changer, allowing you to attach and detach it from your telescope quickly and securely without rotating it or dealing with fine threads.

    How does the M48a Change Ring improve imaging with a coma corrector on a Newtonian?

    It allows you to detach your camera from the coma corrector without unthreading it. This is crucial because it preserves the precise rotational alignment needed for optimal corner-star correction. You can easily remove the camera to check focus or add accessories and reattach it, knowing the orientation is unchanged.

    Does the Baader M48a Change Ring add significant length to the optical path?

    No, it is designed to be very thin, adding only a minimal amount of optical length. This is essential for maintaining the correct back focus distance required by most field flatteners, reducers, and coma correctors.

    Can I use this M48a Change Ring to connect a full-frame camera to my SCT?

    Yes. The M48 thread format is ideal for full-frame sensors as it provides a wider, unvignetted light path compared to T2 threads. This change ring allows you to integrate your full-frame camera into a rigid, quick-release system, which is especially useful with Schmidt-Cassegrain telescopes that often have M48-threaded reducers or adapters.

    What other part do I need to use the Baader M48a Change Ring?

    This M48a Change Ring (#2958547) is the accessory-side component. To create a complete system, you must pair it with the telescope-side Baader M48 Quick Changer (#2958548), which contains the locking mechanism that clamps onto this ring's dovetail.

    Does the Baader M48a Change Ring allow for rotation after it's locked?

    No, and that is its key feature. Once the S48a dovetail is locked into the changer, the connection is fixed and non-rotational. This prevents your camera from rotating under its own weight and ensures your guide camera and imaging camera maintain their relative orientation.

  • Baader Planetarium Warranty