Skip to content
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 Extension Tube - 10mm

Baader M48 Extension Tube - 10mm

by Baader Planetarium
SKU BAA-2958610
$38.00 - $38.00
$38.00
$38.00 - $38.00
$38.00
Price Match Policy!
  • Adds 10mm of optical path length
  • M48 x 0.75 female and male threads
  • Ideal for full-frame sensors to prevent vignetting
  • Features Baader's modern 3mm thread depth standard
1 in stock
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Baader M48 Extension Tube - 10mm

    The Baader M48 Extension Tube adds exactly 10mm of optical path length to any M48 x 0.75 threaded imaging train, making it a critical component for achieving precise back focus. It incorporates Baader's updated 3mm thread depth standard, a design choice specifically made to provide a secure connection without interfering with the internal components of modern, short-bodied astronomy cameras.

    Achieving Precise 10mm Spacing in Your M48 Imaging Train

    Correct spacing is non-negotiable for achieving a flat field with any reducer, flattener, or coma corrector. This 10mm extension tube is a simple, rigid solution for bridging small gaps in your imaging train to hit the required back focus distance. The larger M48 thread diameter provides a wide, unvignetted light path for full-frame and other large-format sensors, ensuring your entire field is illuminated.

    The Baader Standard: 3mm Threads for Modern Camera Compatibility

    As astronomy cameras have become more compact, the old T-2 standard with 5mm deep threads can cause problems, potentially bottoming out or damaging sensitive internal hardware. Baader Planetarium has addressed this by standardizing their new M48 and T-2 components with a shallower 3mm thread depth. This ensures a firm, secure lock while guaranteeing compatibility with the latest generation of cameras that feature minimal body depth.

  • Why do I need the Baader M48 10mm Extension Tube?

    You need this 10mm extension tube when the combined back focus of your existing camera, filter wheel, and adapters doesn't precisely match the distance required by your field flattener or reducer. It provides a simple, rigid way to add a specific length to the optical path, which is essential for achieving sharp stars across the entire image frame.

    My flattener requires 55mm of back focus, but my camera and OAG only provide 45mm. Will the Baader M48 Extension Tube work?

    Yes, this is the perfect application for this part. The Baader M48 Extension Tube - 10mm will bridge the 10mm gap between your current 45mm of spacing and the required 55mm, allowing your optical corrector to function at its designed distance.

    What does Baader's "3mm thread depth standard" mean for the M48 10mm Extension Tube?

    It means the male threads are intentionally machined to a 3mm length, shorter than the older 5mm T-2 standard. This modern design prevents the extension tube from threading too deeply into today's compact astronomy cameras, which have very little internal clearance. This avoids potential damage and ensures a secure fit.

    Can I use the Baader M48 10mm Extension Tube with a full-frame camera like the ZWO ASI6200?

    Absolutely. The M48 thread (often called a "2-inch filter thread") is the preferred standard for connecting to full-frame cameras like the ASI6200. Its larger diameter provides a clear light path that prevents vignetting, which can occur when using smaller T-2 (M42) threads with large sensors.

    Is the Baader M48 10mm Extension Tube part of a larger system?

    Yes, this is a component of the comprehensive Baader Astro T-2 and M48 System. Baader offers a wide range of extension tubes, adapters, and rings that are designed to work together, allowing you to build a robust and precise imaging train for virtually any telescope and camera combination.

    Can I stack this 10mm tube with other Baader M48 extension tubes?

    Yes, all Baader M48 components are designed to be modular. You can thread this 10mm tube together with other Baader M48 extensions (e.g., 5mm, 15mm, 30mm) to create custom lengths for achieving perfect spacing in your imaging setup.

  • Extension Length 10mm
    Thread Type M48 x 0.75 (Male and Female)
    Thread Depth Standard 3mm
    Net weight (kg) 0.01
    Compatible Brands Baader Planetarium
    Clamping System no clamp
    Inner Diameter / Clear Aperture (mm) 45 mm
    Outer Diameter 53 mm
    Usage Adjusting the distances of accessories with M48 thread
    Outer Connection (eyepiece/-camera-sided) M48
    Inner Connection (lens sided) M48
    Adapters Family M48 System

    • Baader M48 Extension Tube - 10mm

      × 1

  • Baader Planetarium Warranty Policy