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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.
Baader Planetarium Adapter M68a to M54a
Baader Planetarium Adapter M68a to M54a
Baader Planetarium Adapter M68a to M54a
Baader Planetarium Adapter M68a to M54a
Baader Planetarium Adapter M68a to M54a

Baader Planetarium Adapter M68a to M54a

by Baader Planetarium
SKU BAA-2458230
$81.00 - $81.00
$81.00
$81.00 - $81.00
$81.00
Price Match Policy!
  • Connects M68 Male Threads to M54 Male Threads
  • Functions as a Reducer for Optical Trains
  • Precision-Machined for Secure, No-Flexure Connections
  • Black Anodized to Minimize Internal Reflections
  • Maintains Optical Alignment Between Components
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Adapter M68a to M54a

    The Baader Adapter M68a to M54a provides a critical, precision-machined link for astrophotography setups, enabling you to connect components with M68 external threads to devices requiring an M54 external thread. This adapter functions as a reducer, stepping down the larger M68 standard often found on high-end focusers and correctors to the widely used M54 thread common on filter wheels and cameras. It ensures a rigid, perfectly aligned connection in your imaging train.

    Bridging M68 and M54 Thread Standards

    This adapter is the solution for integrating hardware from different manufacturers or product lines. By converting an M68 male thread (M68a) to an M54 male thread (M54a), you can securely attach M54-threaded accessories directly to an M68-compatible focuser, field flattener, or off-axis guider. Its primary function is to create a solid, non-flexing joint that preserves the optical alignment crucial for sharp, round stars across the field.

    • Secure Connection: Machined from high-grade aluminum, this adapter prevents the flexure and tilt that can ruin long exposures, a common problem with less precise solutions.
    • Internal Baffling: The interior is blackened and baffled to absorb stray light, preventing internal reflections from reducing contrast in your final images.
    • Low Profile Design: Engineered to add minimal optical length, it helps you maintain precious back focus distance when assembling complex imaging trains.

  • What is the primary use for the Adapter M68a to M54a?

    The primary use for the Adapter M68a to M54a is to connect a component with an M68 male thread, such as a large focuser or coma corrector, to an accessory that has an M54 female thread, like a filter wheel or camera-specific adapter. It "reduces" the thread size while maintaining a secure connection.

    What do the 'a' suffixes in M68a and M54a mean?

    In the Baader Planetarium system, the 'a' suffix typically denotes an external (male) thread. Therefore, this adapter has an M68 male thread on one side and an M54 male thread on the other. You would thread it into a component with female M68 threads and attach a component with female M54 threads to the other side.

    Will the M68a to M54a adapter introduce vignetting in my imaging setup?

    Whether this adapter causes vignetting depends on your telescope's focal ratio and sensor size. While stepping down from a larger M68 opening to a smaller M54 one can potentially vignette large full-frame sensors on very fast optical systems (e.g., f/4 or faster), it is generally not an issue for APS-C or smaller sensors. The M54 standard is designed to fully illuminate sensors up to the APS-C format.

    How do I know if I need this specific M68a to M54a adapter?

    You need this adapter if your imaging train ends with a component that has M68 female threads (like a Baader MPCC III Coma Corrector) and the next device you want to attach (like a ZWO filter wheel) has M54 female threads. This adapter bridges that specific gap. Always measure the threads on your components if you are unsure.

    Is the optical length of the Adapter M68a to M54a specified?

    The manufacturer does not specify the exact optical length. These types of adapters are designed to be as thin as possible to consume minimal back focus. For critical back focus calculations, it is recommended that you measure the adapter's physical thickness with calipers upon receipt.

    Can I use the M68a to M54a adapter for visual observing?

    While primarily designed for astrophotography trains, this adapter can be used in visual setups if you need to solve a specific threading problem, such as attaching an M54-threaded accessory to a focuser drawtube with M68 threads. However, for most visual applications, a standard 2" barrel connection is more common.

  • Input Thread M68 Male (M68a)
    Output Thread M54 Male (M54a)
    Function Reducer Adapter
    Material Black Anodized Aluminum
    Net weight (kg) 0.03
    Compatible Brands Baader Planetarium, Zeiss
    Inner Diameter / Clear Aperture (mm) 45
    Outer Diameter 76
    Type of Adapter Reducing Adapter
    Optical length (mm) 5 mm
    Outer Connection (eyepiece/-camera-sided) M54 x 0.75
    Outer Connection (lens sided) M68 x 1

    • Adapter M68a to M54a

      × 1

  • Baader Planetarium 2-Year Warranty