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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 B3

QHYCCD Adapter Kit - Combo B3

by QHYCCD
SKU QHY-020105
$40.00 - $40.00
$40.00
$40.00 - $40.00
$40.00
Price Match Policy!
  • Connects Nikon F-mount lenses to M54 threaded accessories
  • Provides a precise 12.5mm of optical path length
  • Enables wide-field astrophotography with photographic lenses
  • Secure bayonet and threaded connections
1 in stock
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • QHYCCD Adapter Kit - Combo B3

    The QHYCCD Adapter Kit - Combo B3 provides a precise 12.5mm of optical path length to connect Nikon F-mount lenses to any M54 x 0.75 threaded QHY camera or accessory. This adapter is the key component for achieving the standard 46.5mm back focus required when using wide-field Nikon F lenses for astrophotography with a cooled astronomy camera.

    Connect Nikon F Lenses to Your M54 Gear at 12.5mm

    This adapter solves a critical connection challenge: mounting high-quality photographic lenses onto cooled astronomy cameras. The female Nikon F-mount bayonet provides a secure, non-rotating connection to your lens, while the male M54 thread attaches directly to QHY filter wheels or camera bodies, forming the foundation of a robust wide-field imaging train.

    • Nikon F-Mount Compatibility: Allows the use of a wide range of new and vintage Nikon F-mount SLR and DSLR lenses for capturing large celestial objects like the Andromeda Galaxy (M31) or the Rho Ophiuchi cloud complex.
    • M54 x 0.75 Thread: Provides a standard, rigid interface for connecting to many QHY cooled cameras and the QHYCFW3 series of filter wheels without introducing flexure.
    • 12.5mm Optical Thickness: Engineered to consume exactly 12.5mm of the back focus distance, this adapter simplifies the calculations required to achieve a perfectly flat field with various camera and accessory combinations.

  • What is the primary function of the QHYCCD Adapter Kit - Combo B3?

    The QHYCCD Combo B3 adapter is designed to securely connect a Nikon F-mount camera lens to an astronomy camera or filter wheel that has a female M54 x 0.75 thread. Its primary purpose is to enable wide-field imaging using standard photographic lenses instead of a telescope.

    What is the exact optical path length of the QHYCCD Combo B3 adapter?

    The adapter adds exactly 12.5mm to the optical train. This precise thickness is crucial for calculating the correct spacing needed to achieve sharp focus across the entire imaging sensor, as Nikon F-mount lenses require a total back focus of 46.5mm from the mounting flange to the sensor.

    Which specific Nikon lenses can I use with the QHYCCD Combo B3?

    This adapter is compatible with any lens that uses the standard Nikon F-mount. This includes decades of manual focus (Nikkor AI, AI-S) and autofocus (AF, AF-S) lenses. Note that electronic aperture and focus control are not supported through this purely mechanical adapter.

    What QHYCCD equipment can I connect the M54 thread of the Combo B3 to?

    The male M54 thread is designed to connect directly to QHYCCD accessories like the QHYCFW3 series filter wheels (e.g., QHYCFW3L, QHYCFW3M) or any camera system that presents a female M54 thread. This makes it a core component for building a versatile imaging setup.

    My QHY camera has 17.5mm of back focus. How do I use the 12.5mm Combo B3 adapter to reach the Nikon standard?

    The Nikon F-mount requires a total back focus of 46.5mm. With your camera's 17.5mm and this adapter's 12.5mm, you have a combined 30mm (17.5 + 12.5). You would need to add an additional 16.5mm of M54 spacers between this adapter and your camera to achieve the correct total distance for a flat field.

    Can I use the QHYCCD Combo B3 adapter with a Canon EF lens?

    No. This adapter is specifically for the Nikon F-mount bayonet. It is mechanically incompatible with Canon EF, Sony E, or other lens mounts. You would need a different adapter designed for the specific lens mount you intend to use.

  • Adapter Type Lens Adapter
    Lens Mount Nikon F-Mount (Female)
    Camera Side Connection M54 x 0.75 (Male)
    Optical Thickness 12.5mm

    • QHYCCD M54 to Nikon F Adapter (12.5mm)

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  • QHYCCD Warranty