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July 1st: Store will be closed for Canada Day. Orders placed that day will ship on July 2nd.
July 1st: Store will be closed for Canada Day. Orders placed that day will ship on July 2nd.
Sky-Watcher Canon Camera Adapter (M48)

Sky-Watcher Canon Camera Adapter (M48)

by Sky-Watcher
SKU SW-S20300
CA$40.00 - CA$40.00
CA$40.00
CA$40.00 - CA$40.00
CA$40.00
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  • Connects Canon EOS DSLR/Mirrorless cameras to Sky-Watcher reducers
  • Features a wide M48 x 0.75 thread to prevent vignetting
  • Engineered specifically for Sky-Watcher 0.85x Focal Reducer/Correctors
  • Optimized for Esprit and ProED series apochromatic refractors
  • Provides a secure, direct-threaded connection for astrophotography
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Sky-Watcher Canon M48 Camera Adapter

    This Sky-Watcher Canon M48 Camera Adapter is the essential link for attaching your Canon EOS DSLR or mirrorless camera to a Sky-Watcher 0.85x Focal Reducer/Corrector. It utilizes the larger M48 thread format, ensuring the entire field of view from the corrector illuminates your camera's sensor without the vignetting often caused by standard, smaller T-rings. This adapter is the correct component for serious imaging with Sky-Watcher's Esprit and ProED series refractors.

    M48 Thread for Full-Frame Illumination

    The key to this adapter is its M48 (48mm) diameter threading. Compared to the standard M42 T-thread, the wider M48 aperture passes a larger cone of light, which is critical for preventing darkened corners in your images, especially when using cameras with full-frame or large APS-C sensors. This ensures your flat frames can properly correct a clean, evenly illuminated field from edge to edge.

    Designed for Sky-Watcher 0.85x Reducers

    This is not a generic adapter; it is purpose-built to achieve the correct spacing and secure connection for Sky-Watcher's dedicated 0.85x focal reducer/correctors. It provides a rigid, threaded attachment point that minimizes flexure and maintains perfect optical alignment between your camera and the telescope's corrector optics. This integration is vital for achieving sharp, round stars across the entire frame.

    • Target Telescopes: Specifically designed for the optical correctors used with Sky-Watcher Esprit and ProED series apochromatic refractors.
    • Incompatible Systems: This adapter is not suitable for use with Sky-Watcher's Collapsible Dobsonian line or any system requiring a standard M42 T-ring.

  • What is the difference between this Sky-Watcher M48 adapter and a standard Canon T-ring?

    A standard T-ring uses an M42 x 0.75 thread. This Sky-Watcher M48 Adapter uses a larger M48 x 0.75 thread. The larger diameter of the M48 thread is designed to prevent vignetting (darkened corners) on cameras with larger sensors, like full-frame DSLRs, which is a common issue with the smaller M42 format.

    Will this M48 adapter work with my Sky-Watcher Esprit 120ED and its dedicated reducer?

    Yes, absolutely. This adapter is specifically designed to connect a Canon EOS camera to the dedicated 0.85x focal reducer/correctors that come with the Sky-Watcher Esprit and ProED series telescopes, including the Esprit 120ED. It will provide the correct threading and spacing.

    Can I use the Sky-Watcher M48 adapter on my 8" Dobsonian?

    No. This adapter is not suitable for use on Sky-Watcher's Collapsible Dobsonian line. Those telescopes typically require different adapters for prime-focus photography and are not compatible with the focal reducers this adapter is designed for.

    Why do I need an M48 adapter for my full-frame Canon camera?

    A full-frame sensor (24mm x 36mm) is large enough that the light cone projected by a smaller M42 T-ring can be physically cut off at the corners, causing vignetting. The wider M48 aperture of this adapter ensures the entire sensor is fully illuminated by the corrected field of the telescope's reducer, leading to brighter, cleaner images.

    Does this adapter add any magnification?

    No, the adapter itself does not change the magnification. It is a mechanical part designed solely to connect your Canon camera body to the telescope's focal reducer at the correct distance. The focal reduction (0.85x) is provided by the reducer/corrector optic, not the adapter.

    Will this Sky-Watcher M48 adapter work with other brands of focal reducers?

    It might thread on if the other reducer has a male M48 thread, but it is not guaranteed to produce a good result. This adapter is engineered to provide the specific back-focus distance required by Sky-Watcher's 0.85x reducers. Using it with other brands may result in incorrect spacing and poorly corrected images.

  • Camera Mount Canon EOS EF/EF-S Bayonet
    Telescope Side Thread M48 x 0.75 Female
    Primary Application Astrophotography with DSLR/Mirrorless Cameras
    Compatible Telescope Series Sky-Watcher Esprit and ProED (with dedicated 0.85x reducer/corrector)

    • Sky-Watcher M48 Camera Adapter for Canon

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  • Sky-Watcher 2-Year Warranty