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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 Adapter M54a to M48i
Baader Planetarium Adapter M54a to M48i
Baader Planetarium Adapter M54a to M48i
Baader Planetarium Adapter M54a to M48i
Baader Planetarium Adapter M54a to M48i

Baader Planetarium Adapter M54a to M48i

by Baader Planetarium
SKU BAA-2958751
$56.00 - $56.00
$56.00
$56.00 - $56.00
$56.00
Price Match Policy!
  • Connects M54 Male Threads to M48 Female Threads
  • Enables Use of Standard 2-inch (M48) Filters
  • Low-Profile Design Minimizes Back Focus Consumption
  • Precision-Machined for Secure, No-Flexure Connections
  • Black Anodized Finish to Reduce Stray Light
1 in stock
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Adapter M54a to M48i

    This Adapter M54a to M48i provides the essential connection between components with M54 male threads and the universal M48 female thread standard used by 2-inch astronomy filters. It directly converts an M54 (male) output from a corrector or focuser into an M48 (female) input, allowing you to integrate critical filtration into your imaging train right where it's needed.

    Add M48 Filter Capability to Your M54 Imaging Train

    Many modern flatteners, reducers, and focusers terminate in an M54 male thread. This adapter allows you to directly attach any standard 2-inch filter, which uses the M48 x 0.75 thread pitch, without needing a complex chain of adapters. This is the most direct way to place a light pollution or narrowband filter in front of your camera sensor when using M54-threaded accessories.

    A Low-Profile Solution for Critical Back Focus

    Every millimeter of back focus is a critical resource in an astrophotography setup. This adapter is designed to be as thin as possible, consuming minimal optical path length. Its purpose is to solve a connection problem without creating a spacing problem, ensuring you can still reach focus with your camera and other accessories.

  • What is the primary use for the Adapter M54a to M48i?

    Its primary function is to allow you to thread a standard 2-inch astronomy filter (M48 female thread) onto a field flattener, reducer, or focuser that has an M54 male thread. It's a simple but crucial component for integrating filters into many common imaging trains.

    How do I install a 2-inch filter using the Adapter M54a to M48i?

    First, screw your 2-inch filter into the female M48 side of the adapter. Then, screw the male M54 side of the adapter onto the corresponding female M54 thread on your focuser or corrector. Your filter is now securely mounted in the optical path.

    Will this M54a to M48i adapter work with my telescope's corrector?

    This adapter will work with any corrector, flattener, or accessory that outputs to an M54 male (M54a) thread. It is essential to check the documentation for your specific optical accessory to confirm its output thread size before purchasing.

    What do the 'a' and 'i' in the Adapter M54a to M48i name mean?

    The letters indicate the thread type. In German, 'a' stands for Außengewinde (external/male thread) and 'i' stands for Innengewinde (internal/female thread). So, this adapter has an M54 male thread on one side and an M48 female thread on the other.

    Will this adapter cause any vignetting with my full-frame camera?

    This depends on the focal ratio of your telescope. While the M48 thread is larger than a T-ring, it can still cause some vignetting on fast optical systems (f/4 or lower) when used with full-frame sensors. The adapter itself has a clear aperture limited by the M48 standard and is not the primary cause of vignetting in most systems.

    Is the Adapter M54a to M48i made of metal?

    Yes, this adapter is machined from aluminum and anodized black. This ensures a durable, secure connection and helps to minimize internal reflections that could reduce image contrast.

  • Thread 1 M54 Male (M54a)
    Thread 2 M48 Female (M48i)
    Function Step-down adapter for 2-inch filters

    • Adapter M54a to M48i

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  • Baader Planetarium Warranty