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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 Focusing Eyepiece Holder - 1.25"/M36.4(M)
Baader Focusing Eyepiece Holder - 1.25"/M36.4(M)

Baader Focusing Eyepiece Holder - 1.25"/M36.4(M)

by Baader Planetarium
SKU BAA-2408195
$59.00 - $59.00
$59.00
$59.00 - $59.00
$59.00
Price Match Policy!
  • Adds precise focusing to 1.25" eyepieces or accessories
  • Connects to female M36.4 Vixen-style threads
  • Ideal for finderscopes, guidescopes, and other fixed-focus systems
  • Durable, all-metal construction
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Baader Focusing Eyepiece Holder - 1.25"/M36.4(M)

    The Baader Focusing Eyepiece Holder provides a precise focusing mechanism for any 1.25" eyepiece, adapting it for use with hardware featuring the female M36.4 Vixen-style thread. This component solves the common problem of achieving sharp focus in optical systems that lack their own fine-adjustment focuser, such as many stock finderscopes and guidescopes.

    Fine-Tune Focus for 1.25" Eyepieces on M36.4 Vixen Threads

    This adapter is a simple but critical tool for anyone needing to add independent focus control to their imaging or observing train. By rotating the barrel, you can make minute adjustments to achieve perfect focus without disturbing the main telescope focuser, which is essential for parfocalizing eyepieces or focusing a guide camera.

    It's an essential upgrade for turning a basic Vixen-threaded guidescope into a high-functioning finder when paired with a reticle eyepiece. The adapter's smooth action allows you to bring both the guide stars and the crosshairs into simultaneous, sharp focus.

    • Precise Focus Control: Allows for fine adjustments, critical for achieving sharp focus with guide cameras or making a set of eyepieces parfocal.
    • Vixen M36.4 Standard: The male M36.4 thread connects directly to many Vixen finderscopes and other accessories, expanding their utility with standard 1.25" eyepieces.
    • Secure Clamping: Firmly holds any 1.25" eyepiece or accessory, ensuring no slippage or tilt during focusing or observation.

  • What is the Baader M36.4 Focusing Eyepiece Holder primarily used for?

    This holder is designed to solve two problems at once: it adapts standard 1.25" eyepieces and accessories to equipment with a female M36.4 Vixen thread, and it adds a fine-focusing mechanism. This is ideal for guidescopes or finderscopes that lack their own precise focuser.

    Can I use this Baader holder to turn my Vixen guidescope into a crosshair finder?

    Yes, this is a perfect application. By inserting a 1.25" reticle eyepiece into the holder, you can use the focusing mechanism to achieve a sharp view of both the background stars and the eyepiece's crosshairs, turning a simple guidescope into a fully functional finder.

    What is the M36.4 Vixen thread?

    The M36.4 thread is a specific metric thread standard used by Vixen on the eyepiece side of many of their finderscopes and other small optical accessories. This Baader adapter allows you to connect the vast ecosystem of 1.25" eyepieces and cameras to these Vixen products.

    Does the Baader Focusing Eyepiece Holder add length to the optical path?

    Yes, like any adapter or focuser, it adds optical length. You must ensure your telescope or guidescope has sufficient back focus (or "in-focus") travel to accommodate this additional length and still reach a sharp focus.

    How do I focus my guide camera with the Baader M36.4 holder?

    Simply insert the 1.25" nosepiece of your guide camera into the holder and secure it. Then, while viewing the camera's live feed, rotate the holder's barrel to make fine adjustments until your target guide star is a sharp, tight point of light. This allows you to focus the guider independently of the main imaging camera.

    How does this Baader holder secure the eyepiece?

    The holder uses a secure clamping mechanism, typically one or more non-marring thumbscrews or a compression ring, to hold the 1.25" barrel of an eyepiece or camera firmly in place. This prevents wobble and maintains optical alignment as you focus.

  • Net weight (kg) 0.07
    Screw Type 3x M3 clamping screws and M3 Rotations-Feststellschraube
    Compatible Brands Astro T-2, Baader Planetarium, Takahashi, Vixen, Other
    Clamping System Screw clamps
    Inner Diameter / Clear Aperture (mm) 31.75 (1¼")
    Outer Diameter 47
    Type of Adapter Eyepiece Clamp
    Optical length (mm) 29 – 35.5
    T-2 Part # 11
    Usage holds 1¼" eyepieces on Vixen M36.4 threads
    Inner Connection (eyepiece/-camera-sided) ø 1¼" (31.75 mm)
    Outer Connection (lens sided) M36.4
  • Baader Planetarium Warranty