Celestron Off-Axis Guider (OAG) for SCTs and EdgeHD Series Telescopes

Brand: Celestron

SKU : CE-93648

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  • Fixed-Orientation Helical Focuser.
  • The Most Accurate Way to Guide.
  • Multi-Coated Prism with Aluminized Backing.
  • Includes Adapter for various cameras.
  • Ideal for Schmidt-Cassegrain and EdgeHD Telescopes.
  • Note: If using a full frame sensor camera like the ZWO ASI6200 or QHY 600, an additional adapter is required to provide a fully-illuminated image circle with no vignetting.


Product Details

  • The Celestron Off-Axis Guider is an essential astro-imaging accessory for long focal length telescopes that require the most accurate guiding possible. The Celestron Off-Axis Guider uses a large 12.5mm prism to intercept a small portion of the telescope's light (outside the field of view of the main imaging camera) to locate a guide star. Any movement seen by the guide star will be the exact same movement seen by the imaging camera. Guiding this way will correct for tracking errors, as well as optomechanical errors or flexure. The result: better astro-images with pinpoint round stars.

      Solutions of the Celestron Off-Axis Guider

      • It provides a large 12.5 mm prism that can be adjusted to move closer to the center of the telescopes focal plane, depending on the size of the imaging camera. This results in brighter guide stars, with the help of the large prism to fully illuminate the autoguider sensor.
      • Featuring a high-quality, fixed-orientation Helical focuser. This provides an extremely smooth and accurate focus of the autoguider without changing (or twisting) the autoguider camera orientation.
      • All the needed spacers and adapters are included for most common imaging configurations, including DSLR cameras, Nightscape CCD cameras, and more. The following adapters are included: SCT/EdgeHD, female M48, female M42 (T-thread), male M48, male M42 (T-thread), 3 T-thread adapters.

      Celestron Off-Axis Guider Specifications

      • Weight: 18 ounces.
      • Clear Aperture: 48 mm.
      • Helical Focuser Travel: 8 mm.
      • Telescope Connection: M42 T-thread, M48, and SCT/EdgeHD.
      • Autoguider Connection: M42 T-thread, and standard 1.25-inch adapter.
      • Camera Connection: M42 T-thread, and M48.
      • For setup and configuration, please refer to the Celestron OAG manual on Celestron's website.

      Celestron Product Number: 93648

    1. specifications

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    2. included items

      • Celestron's Off-Axis Guider.
      • 12.5 mm Multi-Coated Prism.
      • Fixed-orientation helical focuser.
      • Adapter: SCT/EdgeHD.
      • Adapter: female M48.
      • Adapter: female M42 (T-thread).
      • Adapter: male M48.
      • Adapter: male M42 (T-thread).
      • Adapter: (3) T-thread spacers.



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