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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
  • For Vixen, Takahashi and Lichtenknecker focusers with M36.4 thread
  • Rotation locking screw secures the focus position
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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. Baader makes it to connect 1.25" eyepieces to Vixen, Takahashi and Lichtenknecker focusers with the M36.4 thread, and its rotational focusing adds fine focus adjustment.

    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.

    Paired with a reticle eyepiece, the fine focus lets you bring both the stars and the crosshairs into 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 to Vixen, Takahashi and Lichtenknecker focusers with an M36.4 female thread, so they accept 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. Baader makes it for Vixen, Takahashi and Lichtenknecker focusers.

    What is the M36.4 Vixen thread?

    The M36.4 thread is a metric thread found on Vixen, Takahashi and Lichtenknecker focusers, according to Baader. This Baader adapter allows you to connect 1.25" eyepieces and cameras to those focusers.

    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 three M3 clamping screws 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
    Telescope-side connection M36.4 Male
    Camera-side connection 1.25" Clamp
    Adjustable range 6.5 mm (rotational focusing)
  • Baader Planetarium Warranty