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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.
QHYCCD Adapter Kit - Combo B2

QHYCCD Adapter Kit - Combo B2

by QHYCCD
SKU QHY-020104
$35.00 - $35.00
$35.00
$35.00 - $35.00
$35.00
Price Match Policy!
  • Connects M54 Threaded Cameras to Canon EF Lenses
  • Provides a Precise 10mm Optical Path Length
  • M54x0.75 Female Threads
  • Secure Bayonet-Style Canon EF Mount
  • Enables Wide-Field Astrophotography with DSLR Lenses
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • QHYCCD Adapter Kit - Combo B2

    The QHYCCD Adapter Kit - Combo B2 is a specialized component designed to bridge the gap between your astronomical camera and high-quality photographic lenses, providing a precise 10mm of optical spacing. This adapter allows you to connect any accessory with M54 threads directly to a Canon EF lens mount, maintaining the critical back focus required for sharp, coma-free stars across the entire frame. With a fixed thickness of 10mm, it serves as a foundational piece in building a stable, wide-field imaging train.

    Achieve 10mm Spacing Between M54 Accessories and Canon EF Lenses

    This adapter's sole purpose is to provide a robust mechanical connection and a fixed 10mm of optical path length. This is essential when using a QHYCCD camera with a Canon EF lens, as these lenses are designed to focus at a specific distance from the sensor. The Combo B2 adapter ensures that your camera's sensor is placed at the correct focal plane, preserving the optical corrections of your lens.

    • M54x0.75 Threading: The female M54 threads offer a wide, non-vignetting connection compatible with many QHYCCD cameras and filter wheels.
    • Canon EF Bayonet: Provides a secure, locking connection to the full range of Canon EF-mount photographic lenses, from wide-angle to telephoto.
    • Fixed 10mm Path Length: Simplifies back focus calculations by providing a known, non-adjustable spacing value for your imaging train.

  • What is the primary function of the QHYCCD Adapter Kit - Combo B2?

    The primary function of the QHYCCD Adapter Kit - Combo B2 is to connect a camera or accessory with M54 threads to a Canon EF-mount lens. It provides exactly 10mm of spacing, which is critical for achieving the correct back focus needed for sharp, well-corrected images with photographic lenses.

    What are the connection types on the QHYCCD Combo B2 adapter?

    The adapter features a female M54x0.75 thread on the camera side and a male Canon EF bayonet mount on the lens side. This allows you to attach M54-threaded accessories like a QHYCCD camera or filter wheel to any Canon EF lens.

    How do I know if I need the 10mm spacing from the QHYCCD Combo B2?

    You need this 10mm adapter if the total back focus requirement of your Canon EF lens (typically 44mm) is not met by your camera and any other accessories in the light path. You must calculate the total length of your imaging train; this adapter provides a fixed 10mm component to help you reach that target distance.

    Can I use the QHYCCD Combo B2 to image the Andromeda Galaxy (M31) with a telephoto lens?

    Yes, absolutely. This adapter is ideal for that purpose. By connecting a sensitive QHYCCD camera to a Canon EF telephoto lens (e.g., 200mm or 300mm), you can create a wide-field imaging system perfectly suited for large targets like the Andromeda Galaxy (M31) or the Orion Nebula (M42).

    Will the QHYCCD Combo B2 work with my QHY268C camera and a Canon EF 50mm f/1.8 lens?

    Yes, this adapter provides the correct physical mount to connect a QHY268C (which uses M54 threads) to a Canon EF 50mm lens. The 10mm spacing it provides is one piece of the puzzle; you will need to ensure your total back focus stack (camera sensor depth + filter wheel + this adapter) equals the lens's required 44mm back focus for optimal results.

    Is the spacing of the QHYCCD Combo B2 adapter adjustable?

    No, the QHYCCD Adapter Kit - Combo B2 provides a fixed optical path length of 10mm. It is not adjustable. This fixed length ensures rigidity and simplifies back focus calculations.

  • Adapter Type M54 Thread to Canon EF Lens Mount
    Optical Path Length 10mm
    Camera-Side Connection M54 x 0.75 Female Thread
    Lens-Side Connection Canon EF Bayonet Mount

    • 10mm M54 to Canon EF Adapter

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  • QHYCCD Warranty