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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 Adapter - Zeiss M44(F)/T-2(F)

Baader Adapter - Zeiss M44(F)/T-2(F)

by Baader Planetarium
SKU BAA-1508041
$49.00 - $49.00
$49.00
$49.00 - $49.00
$49.00
Price Match Policy!
  • Connects female Zeiss M44 threads to female T-2 threads
  • Integrates legacy Zeiss optics with the modern Baader Astro T-2 System
  • Enables the use of T-2 diagonals, focusers, and cameras
  • Precision-machined for a rigid, non-flexing connection
  • Low-profile design minimizes added optical path length
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Baader Adapter - Zeiss M44(F)/T-2(F)

    The Baader Zeiss M44(F)/T-2(F) Adapter provides the essential mechanical link between classic optics using the female Zeiss M44 thread and the vast ecosystem of modern accessories based on the female T-2 (M42x0.75) thread. This single component is the key to unlocking new capabilities for high-quality legacy equipment, allowing you to attach current-generation cameras, filter wheels, and other T-2 components directly to your Zeiss instrument.

    Integrating Classic Zeiss M44 Optics into the Baader T-2 System

    Many older, high-quality Zeiss telescopes, spotting scopes, and microscope components utilize an internal M44 thread that is incompatible with today's common T-2 and M48 standards. This adapter solves that problem by offering a direct, secure conversion to the Baader Astro T-2 System, which has become a de facto standard for amateur astronomy hardware.

    By installing this adapter, you can give valuable vintage optics a new lease on life. It provides a robust, threaded connection that prevents the flexure and misalignment common with generic, set-screw-based solutions, which is critical for maintaining sharp focus during astrophotography.

    • Legacy Modernization: Makes classic Zeiss optics fully compatible with the entire range of Baader T-2 accessories, from extension tubes to Off-Axis Guiders.
    • Imaging-Ready Connection: Creates a rigid, all-threaded optical train essential for connecting modern CMOS or DSLR cameras without introducing tilt or sag.
    • System Modularity: Unlocks the ability to build custom, compact optical configurations by combining your Zeiss objective with T-2 components like diagonals, Barlows, or telecompressors.

  • What is the primary use for the Baader M44/T-2 adapter?

    This adapter is designed specifically to connect optical components that have a female (internal) Zeiss M44 thread to accessories that use the female (internal) Baader T-2 thread (M42x0.75). Its main purpose is to modernize older, high-quality Zeiss equipment for use with current astronomy accessories.

    Will this Baader adapter work with any M44 thread?

    No. It is crucial to note that this adapter is for the specific Zeiss M44 thread standard. Other M44 threads with different pitches exist (e.g., M44x1 or M44x0.75). You must confirm your equipment uses the Zeiss M44 standard for this adapter to fit correctly.

    What kinds of accessories can I use with my Zeiss optic after installing this Baader adapter?

    Once installed, your Zeiss optic can connect to the entire Baader Astro T-2 System. This includes:

    • T-2 Star Diagonals (Prism or Mirror)
    • T-2 Extension Tubes for setting correct spacing
    • Adapters for 1.25" or 2" eyepieces
    • Camera bayonets for attaching DSLR or mirrorless cameras
    • T-2 Filter Wheels or Filter Drawers

    Does the Baader M44/T-2 adapter add significant length to the optical path?

    As a low-profile ring adapter, it is engineered to add minimal optical path length, preserving as much precious back focus as possible. While the exact optical length is not specified, its design is intended for systems where focus travel may be limited. Always verify you have sufficient focus travel for your intended accessory chain.

    How do I know if my Zeiss equipment has the M44 inner thread?

    The best way is to consult the original documentation for your Zeiss telescope, spotting scope, or accessory. In the absence of documentation, you may need to carefully measure the internal diameter of the thread on your equipment. A diameter close to 44mm is a strong indicator, but confirming the specific Zeiss standard is key for compatibility.

    Can I use this Baader adapter to attach a DSLR to my Zeiss telescope for imaging?

    Yes, this is a very common application. You would thread this M44/T-2 adapter into your Zeiss optic, and then attach a T-2 bayonet adapter (sold separately) for your specific camera brand (e.g., Canon EOS or Nikon F) to the other side. This creates a secure, all-threaded connection for prime-focus astrophotography.

  • Net weight (kg) 0.01
    Compatible Brands Astro T-2, Baader Planetarium, Zeiss
    Inner Diameter / Clear Aperture (mm) 40
    Outer Diameter 49.5
    Type of Adapter Reducing Adapter
    Optical length (mm) 14
    T-2 Part # 09
    Inner Connection (eyepiece/-camera-sided) M44
    Inner Connection (lens sided) M42 x 0.75 (T-2)
    Adapters Family T-2 System

    • Baader Adapter - Zeiss M44(F)/T-2(F)

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  • Baader Planetarium Warranty Policy