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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 M48 Spacer Ring for MPCC III / Protective EOS T-Ring
Baader M48 Spacer Ring for MPCC III / Protective EOS T-Ring
Baader M48 Spacer Ring for MPCC III / Protective EOS T-Ring
Baader M48 Spacer Ring for MPCC III / Protective EOS T-Ring

Baader M48 Spacer Ring for MPCC III / Protective EOS T-Ring

by Baader Planetarium
SKU BAA-2458405
$31.00 - $31.00
$31.00
$31.00 - $31.00
$31.00
Price Match Policy!
  • Connects the Baader MPCC Mark III to the Baader Protective EOS T-Ring
  • Establishes the critical 55mm back focus distance for coma correction
  • Features M48 male and female threads for a secure connection
  • Machined specifically for the Baader Planetarium optical system
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Baader M48 Spacer Ring for MPCC III / Protective EOS T-Ring

    This Baader M48 Spacer Ring is the essential mechanical link for astrophotographers using the Baader MPCC Mark III coma corrector with a Canon EOS DSLR camera. It is purpose-built to connect the M48 threads of the MPCC III directly to the Baader Protective EOS T-Ring, providing the exact spacing required to achieve the mandatory 55mm back focus distance for optimal optical correction.

    Precision Spacing: Achieving 55mm Back Focus with the MPCC III

    A coma corrector's effectiveness is entirely dependent on maintaining a precise distance between its optics and the camera's sensor. For the Baader MPCC Mark III, this distance is a non-negotiable 55mm. This M48 spacer ring is not a generic adapter; it is machined to provide the exact extension needed to bridge the gap between the coma corrector and the Baader Protective T-Ring, ensuring your stars are sharp and round across the entire photographic field.

  • What is the primary function of the Baader M48 Spacer Ring?

    Its primary function is to establish the correct 55mm back focus when connecting a Baader MPCC Mark III coma corrector to a Baader Protective Canon EOS T-Ring. This precise spacing is critical for the coma corrector to work effectively.

    Why is correct spacing so critical when using the Baader MPCC Mark III on my Newtonian?

    Coma correctors like the MPCC Mark III are designed to work at a specific distance from the focal plane (your camera sensor). If this distance is incorrect, the corrector will either under-correct or over-correct for coma, resulting in distorted stars, especially near the edge of the frame. This spacer eliminates guesswork and ensures a sharp, corrected field for your images of targets like the Andromeda Galaxy (M31).

    Which specific components does this Baader M48 spacer connect?

    This spacer is designed to thread directly between two specific Baader Planetarium products:

    • Baader Multi-Purpose Coma Corrector (MPCC) Mark III on the telescope side.
    • Baader Protective Canon EOS T-Ring on the camera side.

    Can I use this Baader M48 spacer with a different T-ring or coma corrector?

    While the M48 threads are standard, this spacer's length is calculated specifically for the Baader MPCC III and Protective T-Ring combination to achieve 55mm of back focus. Using it with other components will likely result in incorrect spacing and poor optical correction.

    How do I assemble the imaging train for my DSLR with this Baader spacer?

    The correct assembly order starting from the telescope's focuser is: 1) Baader MPCC Mark III, 2) this M48 Spacer Ring, 3) Baader Protective EOS T-Ring, and 4) your Canon EOS camera body. This creates a solid, threaded connection with the correct optical distance.

    Does the Baader M48 Spacer Ring contain any glass or optics?

    No, this is a purely mechanical component. It is an empty, precisely machined aluminum ring designed only to provide a specific amount of physical distance in an optical train. It does not alter the light path optically.

  • Compatibility Baader MPCC Mark III Coma Corrector
    Compatibility Baader Protective Canon EOS T-Ring
    Thread Type M48 x 0.75
    Net weight (kg) 0.01
    Compatible Brands Baader Planetarium
    Inner Diameter / Clear Aperture (mm) 47
    Outer Diameter 54
    Type of Adapter Extension, Reducing Adapter
    Optical length (mm) 2
    Inner Connection (eyepiece/-camera-sided) M48
    Outer Connection (lens sided) S52
    Adaptable to MPCC III / Protective EOS T-Ring
    Adapters Family M48 System
  • Baader Planetarium Warranty