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QHYCCD Adapter Kit Combo G1

by QHYCCD
SKU QHY-020135-G1
CA$84.00 - CA$84.00
CA$84.00
CA$84.00 - CA$84.00
CA$84.00
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  • Achieves standard 55mm back focus for M48 correctors
  • Provides 56mm back focus for Takahashi Epsilon M54 systems
  • Included as standard with the QHY268C and QHY600C-PH SBFL
  • Terminates in either M48 or M54 threads
  • Utilizes a robust 6-screw connection system to prevent tilt
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • QHYCCD Adapter Kit Combo G1

    The QHYCCD Adapter Kit Combo G1 is a standardized solution for achieving precise back focus, accommodating the 55mm standard for M48 correctors and the 56mm requirement for Takahashi Epsilon reflectors with M54 threads. It is the standard adapter kit supplied with the QHY268C and QHY600C-PH SBFL, so no back focus calculation is needed.

    Precise Spacing for 55mm and 56mm Optical Systems

    Hitting the exact back focus is critical for a flat field, and the two most common standards are 55mm and 56mm. The G1 Adapter Kit is engineered to meet both, providing the necessary components to achieve the 55mm distance required by most coma correctors and flatteners, as well as the 56mm needed for specialized systems like the Takahashi Epsilon series.

    Cross-Compatible M48 and M54 Thread Support

    Modern imaging trains often use either M48 (2-inch filter) or M54 threads, especially with full-frame cameras and large correctors. The Adapter Kit Combo G1 includes the necessary components to interface with both M48 and M54 connections, ensuring broad compatibility with a wide range of telescopes, correctors, and off-axis guiders without needing to purchase separate adapter sets.

    The 6-Screw System: A More Stable Imaging Train

    Instead of relying on simple threads which can introduce sag or tilt, QHYCCD's adapter system uses a robust 6-screw connection. This method ensures all components are held rigidly and perfectly parallel to the sensor plane. This design prevents the subtle positional shifts that can occur as threaded connections are tightened, resulting in a more reliable and stable optical train from the camera to the telescope.

    DSLR Lenses Need a Separate Lens Adapter

    The G1 kit is built for 55mm and 56mm back focus with M48 or M54 threads. Canon lenses need 44.1mm and Nikon lenses 46.5mm of back focus, so they are connected with QHYCCD's separate Canon EF or Nikon F lens adapters rather than with the G1 kit.

    Adapter Kit G1 vs. DIY Solutions: Simplicity and Reliability

    Previously, assembling a correct imaging train required calculating the necessary back focus and purchasing individual spacers of various thicknesses—a process prone to error, especially for beginners. The G1 kit is a pre-engineered solution that removes this guesswork entirely.

    • DIY/Individual Spacers: Requires you to measure and calculate the light path of every component. A small miscalculation can lead to poor star shapes and wasted imaging time.
    • QHYCCD Kit G1: Provides a tested, verified combination of parts designed to achieve common back focus standards like 55mm and 56mm directly. It is a faster, more reliable method for getting your imaging rig properly configured.

  • What is the main purpose of the QHYCCD Adapter Kit Combo G1?

    The QHYCCD Adapter Kit Combo G1 is a comprehensive solution designed to achieve precise back focus spacing for various common astrophotography setups. It simplifies the process of connecting a QHYCCD camera to different telescopes and correctors by providing all the necessary components in one pre-configured package to hit standards like 55mm and 56mm.

    What optical systems are supported by the QHYCCD G1 kit's 55mm and 56mm back focus options?

    The kit is designed for broad compatibility. The 55mm back focus configuration is for typical multi-purpose coma correctors and flatteners using M48 threads. The 56mm configuration is specifically for systems like the Takahashi Epsilon reflector series, which often use M54 threads.

    Can I use the QHYCCD G1 kit with my Takahashi Epsilon reflector?

    Yes. The Adapter Kit Combo G1 is specifically designed to achieve the 56mm back focus required by the Takahashi Epsilon series, interfacing with its native M54 threads. This ensures your camera sensor is placed at the optimal distance for a flat, corrected field.

    I have a coma corrector with M48 threads requiring 55mm back focus. Is the QHYCCD G1 kit correct for this?

    Yes, absolutely. The QHYCCD G1 kit is designed to create the industry-standard 55mm back focus distance for correctors with M48 threads. This makes it a suitable choice for most popular coma correctors and field flatteners on the market.

    Why does QHYCCD use a 6-screw system in the G1 kit instead of just threads?

    The 6-screw connection system provides a more rigid and stable connection than a simple threaded interface. Threads can have minor errors or loosen, potentially causing tilt in the imaging train. The 6-screw method locks components together, ensuring they remain perfectly parallel and eliminating a common source of elongated stars at the edge of the field.

    Does the QHYCCD G1 kit support connecting my Canon DSLR lens to a QHY camera?

    Not on its own. The G1 kit is built for 55mm and 56mm back focus with M48 or M54 threads. Canon lenses need 44.1mm of back focus, which QHYCCD provides with a separate Canon EF lens adapter.

  • Target System Required Back Focus & Thread
    Typical Multi-Purpose Coma Corrector 55mm, M48 Threads
    Takahashi Epsilon Reflector Series 56mm, M54 Threads
    Telescope-side connection M48x0.75 / M54x0.75 (55mm or 56mm back focus)
    Camera-side connection QHY268C / QHY600C-PH SBFL (standard accessory)

    • 2in filter drawer

      × 1

    • M54-M48 threads adapter

      × 1

    • 1mm spacer

      × 1

    • 2mm spacer

      × 1

    • 4mm spacer

      × 1

    • 5mm spacer

      × 1

    • 10mm spacer

      × 1

    • M3 screws

      × 1

  • QHYCCD Warranty