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Baader Planetarium 2" Nosepiece to M54a – with Safety-Kerf
Baader Planetarium 2" Nosepiece to M54a – with Safety-Kerf
Baader Planetarium 2" Nosepiece to M54a – with Safety-Kerf
Baader Planetarium 2" Nosepiece to M54a – with Safety-Kerf

Baader Planetarium 2" Nosepiece to M54a – with Safety-Kerf

par Baader Planetarium
UGC BAA-2958770
CA$56.00 - CA$56.00
CA$56.00
CA$56.00 - CA$56.00
CA$56.00
Égalisation de prix!
  • Connects M54 threaded accessories to any 2" focuser or adapter
  • M54 external (male) thread provides a wide, secure connection
  • Features Baader's Safety-Kerf to prevent slippage
  • Standard 2" barrel diameter for universal compatibility
  • Black-anodized aluminum construction
En rupture temporaire
Alerte de retour en stock
Info disponibilité
Admissible à la livraison GRATUITE au Canada pour les commandes de plus de 500$.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • 2" Nosepiece to M54a – with Safety-Kerf

    The Baader 2" Nosepiece to M54a adapter provides a secure, standardized connection from any 2" focuser or visual back to the M54 thread system. This adapter features an external M54 thread, making it a critical component for attaching modern correctors and accessories that use this larger format to avoid vignetting.

    The M54 Thread: A Wider Path for 2" Imaging Systems

    The M54 thread offers a significantly larger clear aperture than the older M42 T-thread standard. This makes the 2" Nosepiece to M54a adapter essential for building imaging trains with full-frame sensors, as it minimizes the risk of vignetting that can occur when light from the edge of the field is clipped by a smaller M42 connection.

    Baader's Safety-Kerf: A 2" Barrel That Resists Slipping

    This nosepiece features Baader's proprietary Safety-Kerf design—a series of small, machined grooves along the 2" barrel. When used with a compression-ring eyepiece clamp, the brass ring deforms slightly into these kerfs, creating a positive mechanical lock. This design prevents the nosepiece, and your expensive camera or accessories, from slipping out even if the clamp screw loosens slightly.

  • What is the Baader 2" Nosepiece to M54a adapter used for?

    This adapter allows you to insert accessories that have a female M54 thread into a standard 2" focuser, visual back, or diagonal. It's commonly used to connect coma correctors, field flatteners, and large-format cameras to a telescope's 2" drawtube.

    What is a "Safety-Kerf" and how does it prevent accessories from falling?

    The Safety-Kerf is a series of machined grooves on the 2" barrel. Unlike a simple smooth barrel or a traditional undercut, the kerfs provide multiple contact points for a compression ring to grip. This creates a much more secure, slip-free connection that resists rotation and prevents the adapter from pulling out of the focuser if a thumbscrew backs out slightly.

    Can I use this Baader M54 adapter to connect a Baader MPCC Mark III to my 2" focuser?

    Yes, absolutely. The Baader MPCC Mark III Coma Corrector has female M48 threads on the telescope side. You would first thread on an M48 to M54 adapter, and then thread this 2" nosepiece into the corrector. This creates a solid, secure 2" barrel for inserting the entire assembly into your Newtonian's focuser.

    I have a ZWO camera with an M54 interface. Will this adapter let me insert it into my Celestron SCT's 2" visual back?

    Yes. If your ZWO camera has a female M54 thread for its primary connection (common on larger cooled cameras), this adapter's external M54 thread will screw directly into it. This converts your camera's threaded body into a standard 2" nosepiece, ready to slide into the 2" visual back on your SCT.

    Why should I use an M54 adapter instead of a standard 2" T-adapter (M42)?

    The primary reason is to prevent vignetting with large camera sensors. The M54 thread has a larger clear aperture than the M42 T-thread. For imagers using full-frame (36x24mm) or larger APS-C sensors, an M54 connection provides a wider light path, ensuring the stars at the corners of your image receive full illumination.

    Is the M54 thread on this adapter male or female?

    The thread on this adapter is M54 male (external). It is designed to thread into an accessory that has a female M54 port.

  • Net weight (kg) 0.03
    Inner Diameter / Clear Aperture (mm) 47 mm
    Outer Diameter 59 mm
    Type of Adapter Nosepiece
    Optical length (mm) 4.3 mm
    Outer Connection (eyepiece/-camera-sided) M54 x 0.75
    Inner Connection (lens sided) M48
    Outer Connection (lens sided) ø 2" (50.8mm)
    Adapters Family M54 System
  • Baader Planetarium Warranty