Skip to content
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 Adapter S58-short to M54a – for all BDS Diamond Steeltrack®
Baader Planetarium Adapter S58-short to M54a – for all BDS Diamond Steeltrack®
Baader Planetarium Adapter S58-short to M54a – for all BDS Diamond Steeltrack®

Baader Planetarium Adapter S58-short to M54a – for all BDS Diamond Steeltrack®

by Baader Planetarium
SKU BAA-2957209
$50.00 - $50.00
$50.00
$50.00 - $50.00
$50.00
Price Match Policy!
  • Adapts the Baader S58 drawtube thread to a female M54a thread
  • Designed for all Baader Diamond Steeltrack® (BDS) focusers
  • Enables direct connection of M54-threaded imaging accessories
  • Low-profile "short" design minimizes added backfocus
Backordered
Request Stock Alert
Availability Info
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Adapter S58-short to M54a – for all BDS Diamond Steeltrack®

    This Baader Planetarium adapter directly converts the proprietary S58 dovetail thread on the drawtube of all Baader Diamond Steeltrack® (BDS) focusers to the widely used M54a female thread. It provides a secure, rigid connection point for attaching modern imaging train components, such as field flatteners, reducers, off-axis guiders, and filter wheels that rely on the M54 standard.

    S58 to M54a Thread Adaptation for Baader Steeltrack Focusers

    The primary function of this adapter is to bridge the gap between your high-quality Baader Steeltrack focuser and the common M54 accessory ecosystem. By threading directly onto the focuser's S58 drawtube, it creates a robust, non-flexing female M54 port. The "short" designation indicates a design focused on consuming minimal backfocus, preserving precious optical path length for your imaging components.

  • What is the purpose of the Baader S58-short to M54a adapter?

    Its purpose is to convert the native S58 thread on a Baader Diamond Steeltrack® focuser drawtube to a standard female M54a thread. This allows you to securely attach accessories like correctors, filter wheels, and cameras that use the M54 connection standard.

    Which focusers is this S58 to M54a adapter compatible with?

    This adapter is specifically designed for compatibility with all Baader Planetarium Diamond Steeltrack® (BDS) focusers, including SCT, Refractor, and Newtonian versions which share the S58 drawtube thread.

    What kind of accessories can I attach to my Steeltrack focuser using this M54a adapter?

    You can attach any astronomical accessory that features a male M54 thread. This commonly includes:

    • Field Flatteners and Reducers: Many modern correctors use M54 threads for a wide, unvignetted optical path.
    • Filter Wheels and Drawers: Allows direct connection to popular M54-based filter systems.
    • Off-Axis Guiders (OAGs): Provides a solid connection point for M54 OAG bodies.
    • Camera Adapters: Connects to various camera mounting systems that terminate in an M54 thread.

    Is this the correct adapter for connecting a ZWO EFW with an M54 interface to my Baader Steeltrack?

    Yes. If your ZWO Electronic Filter Wheel (EFW) or other imaging accessory has a male M54 thread for connection to the telescope, this adapter will provide the necessary female M54 port on your Baader Diamond Steeltrack® focuser.

    Does the S58-short adapter add significant length to the optical path?

    The adapter is designated as "short," meaning it is engineered to be as low-profile as possible to conserve backfocus. While any adapter necessarily adds some length, this model is designed to minimize that addition, preserving critical space for your imaging train components.

    How do I install the Baader S58-short to M54a adapter?

    Installation is straightforward. You simply unthread any existing adapter from the end of your Baader Diamond Steeltrack® focuser's drawtube to expose the male S58 thread. Then, you carefully thread the S58-short to M54a adapter on until it is snug and secure.

  • Product S58-short to M54a Adapter
    Compatibility All Baader Diamond Steeltrack® (BDS) Focusers
    Input Thread (Focuser Side) S58 Dovetail
    Output Thread (Accessory Side) M54a (Female)

    • Adapter S58-short to M54a

      × 1

  • Baader Planetarium Warranty