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Celestron Large SCT & EdgeHD Adapter V2 for Off-Axis Guider
Celestron Large SCT & EdgeHD Adapter V2 for Off-Axis Guider
Celestron Large SCT & EdgeHD Adapter V2 for Off-Axis Guider

Celestron Large SCT & EdgeHD Adapter V2 for Off-Axis Guider

by Celestron
SKU CEL-93666
$41.95 - $41.95
$41.95
$41.95 - $41.95
$41.95
Price Match Policy!
  • Connects Celestron Off-Axis Guider to 9.25", 11", and 14" SCT & EdgeHD telescopes
  • Provides a 63mm clear aperture to fully illuminate full-frame camera sensors
  • Engineered with a 38mm optical length for correct DSLR back-focus spacing
  • Weighs just 6 oz (170.09 g)
  • Durable black anodized aluminum construction with glare-reducing internal surfaces
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  • Description
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  • Celestron Large SCT & EdgeHD Adapter V2 for Off-Axis Guider

    The Celestron Large SCT & EdgeHD Adapter V2 for Off-Axis Guider provides the critical connection for full-frame imaging, featuring a 63mm clear aperture to prevent vignetting on large sensors. Its precisely machined 38mm optical length supplies the exact back-focus required for DSLR cameras when used with a Celestron Off-Axis Guider on 9.25", 11", or 14" telescopes, all within a lightweight 6 oz (170.09 g) aluminum body.

    Illuminate Your Full Frame: A 63mm Clear Aperture for Large Sensors

    Your large SCT or EdgeHD optical tube produces a substantial image circle, but standard adapters can become a bottleneck, causing vignetting on full-frame sensors. This adapter solves that problem with a massive 63mm (2.48") clear aperture, ensuring the entire light cone reaches your Canon 5D, 6D, or other large-format camera sensor. This allows you to utilize the full optical power of your 9.25", 11", or 14" telescope without dark corners compromising your images.

    38mm Optical Length: The V2 Advantage for DSLR Back-Focus

    Achieving the correct back-focus distance is non-negotiable for sharp, coma-free images, especially with an Off-Axis Guider in the train. The V2 version of this adapter is engineered with a specific 38mm optical length. This length is no accident—it's the exact spacing needed to place a DSLR camera sensor at the focal plane when paired with the Celestron Off-Axis Guider, eliminating the need for extra, potentially flexing spacers and simplifying your imaging setup.

    Field-Ready Construction: 6 oz of Black Anodized Aluminum

    Built from machined, black-anodized aluminum, this adapter weighs only 6 oz (170.09 g), adding minimal weight to your imaging train and making balancing easier. The internal surfaces are sandblasted to eliminate internal reflections and maximize image contrast. A knurled exterior surface provides a secure grip for easy threading and unthreading, even with gloves on during cold nights.

  • What is the main purpose of the Large SCT & EdgeHD Adapter V2?

    Its primary purpose is to connect a Celestron Off-Axis Guider (OAG) to a larger 9.25", 11", or 14" SCT or EdgeHD telescope. It provides a wide 63mm clear aperture to prevent vignetting on full-frame sensors and has a specific 38mm optical length to achieve correct back-focus for DSLR cameras without extra spacers.

    Do I need this V2 adapter for my EdgeHD 11" and a full-frame DSLR camera?

    Yes, this adapter is highly recommended for that exact setup. The EdgeHD 11" produces a large, corrected image circle. This adapter's 63mm aperture ensures that light cone isn't cut off before reaching your full-frame sensor, preventing vignetting. The 38mm length also simplifies achieving the correct back-focus when using Celestron's OAG.

    With the Adapter V2, will I still need T-spacers for my DSLR and Celestron OAG?

    No. The key benefit of the V2 adapter is its 38mm optical length, which is specifically designed to provide the correct spacing for a standard DSLR camera when the Celestron Off-Axis Guider is in the imaging train. This eliminates the trial-and-error of adding separate spacers.

    Can I use the Large SCT & EdgeHD Adapter V2 with a smaller 8" SCT or EdgeHD?

    While it may physically thread on, this adapter is optimized for the larger rear cells and image circles of the 9.25", 11", and 14" models. For an 8" telescope, Celestron offers a different, smaller adapter (#93648) designed for its smaller image circle and physical size.

    Can I use this adapter without an Off-Axis Guider?

    This adapter is specifically designed to be part of an imaging train that includes the Celestron Off-Axis Guider. Its 38mm length is calculated based on the OAG being present. If you are not using an OAG, you will need a different set of adapters and spacers to achieve the correct back-focus for your camera.

    How does the sandblasted interior of the Adapter V2 help my images?

    The sandblasted, non-reflective internal surfaces scatter stray light that might otherwise bounce around inside the adapter and reach your camera sensor. This reduces glare and significantly improves the contrast of your final images, making faint details more visible against a dark sky background.

  • Optical Length 38mm (1.49")
    Clear Aperture 63mm (2.48")
    Construction Aluminum Black Anodized
    Weight 6 oz (170.09 g)

    • Celestron Large SCT & EdgeHD Adapter V2 for Off-Axis Guider

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  • Celestron 2-Year Warranty