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July 1st: Store will be closed for Canada Day. Orders placed that day will ship on July 2nd.
Celestron Reducer Lens .7x - EdgeHD 1400
Celestron Reducer Lens .7x - EdgeHD 1400
Celestron Reducer Lens .7x - EdgeHD 1400

Celestron Reducer Lens .7x - EdgeHD 1400

by Celestron
SKU CEL-94240
CA$1,180.00 - CA$1,180.00
CA$1,180.00
CA$1,180.00 - CA$1,180.00
CA$1,180.00
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  • Reduces EdgeHD 1400 focal ratio by a factor of 0.7x
  • Custom 5-element optical design preserves flat-field imaging
  • Provides a generous 146mm of back focus for imaging equipment
  • Delivers a 42mm image circle, fully illuminating full-frame sensors
  • Features exotic Lanthanum glass elements to eliminate chromatic aberration
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Celestron Reducer Lens .7x - EdgeHD 1400

    The Celestron Reducer Lens .7x for the EdgeHD 1400 is an optically-matched corrector that transforms the telescope into a faster, wider imaging system without compromising its flat-field correction. Its 5-element design reduces the focal ratio from f/11 to f/7.7, increasing the field of view by 43% while cutting required exposure times in half. Engineered with 146mm of back focus and a 42mm image circle, this 3.25 lb reducer fully accommodates large, full-frame CCD and DSLR cameras with accessories like filter wheels and off-axis guiders.

    5-Element Optics: Maintaining Flat-Field EdgeHD Correction

    Unlike a generic reducer, this 5-element lens is designed specifically to work with the EdgeHD 1400's optical system, ensuring the field remains perfectly flat from corner to corner on the sensor. Celestron uses high-index, "rare earth" Lanthanum glass elements to provide high-contrast views and minimize chromatic aberration, delivering sharp stars with no color fringing. All air-to-glass surfaces are fully multi-coated for maximum light transmission, while blackened lens edges prevent internal reflections from reducing image contrast.

    Imaging at f/7.7: A 43% Wider Field and Halved Exposure Times

    The primary purpose of the 0.7x reducer is to make the EdgeHD 1400 a more capable deep-sky imaging instrument. By reducing the focal length, it increases the true field of view by 43%, allowing you to frame large targets like the Andromeda Galaxy (M31) or the North American Nebula (NGC 7000) in their entirety. This reduction also makes the telescope one full f-stop faster, reducing the required imaging exposure time by half to achieve the same signal-to-noise ratio.

    146mm Back Focus: Integrating Full-Frame Cameras and Accessories

    A critical advantage of this reducer is its substantial 146mm (5.75") of optimal back focus, providing ample space for complex imaging trains. This allows you to easily incorporate accessories like an off-axis guider, filter wheel, or adaptive optics system without struggling to reach focus. The optical design delivers a corrected 42mm image circle, which is large enough to fully illuminate even full-frame sensors without vignetting, making it a professional-grade solution for serious astrophotography.

    Mechanical Design: A 60mm Aperture with a 3.25" Thread-On Interface

    The reducer's housing is CNC machined from aluminum for precise optical alignment and thermal stability. It threads directly onto the large 3.25" port on the rear cell of the EdgeHD 1400, creating a rigid, flexure-free connection that prevents mechanical vignetting. With a clear aperture of 60mm, the reducer ensures that the full 42mm corrected image circle reaches the sensor, maximizing the performance of your telescope and camera system. Threaded metal covers are included to protect the optics from dust and scratches when not in use.

  • What is the main benefit of the EdgeHD 1400 .7x Reducer?

    The reducer makes the telescope "faster" and "wider." It reduces the focal ratio from f/11 to a faster f/7.7, which cuts your exposure times in half. It also increases the field of view by 43%, allowing you to capture larger deep-sky objects that would not fit in the frame at the native focal length.

    How do I set the correct 146mm back focus for my camera?

    The 146mm distance is measured from the rear flange of the reducer to your camera's sensor. You will need to use a combination of T-adapters and extension tubes to achieve this precise spacing. You must account for the optical path length of any accessories, such as an off-axis guider or filter wheel, when calculating the required extensions.

    Can I use this reducer with a full-frame camera on my EdgeHD 1400?

    Yes, absolutely. This reducer is designed to produce a 42mm corrected image circle, which is large enough to cover a standard 35mm full-frame sensor (which has a ~43mm diagonal) without significant vignetting or loss of star quality at the corners.

    Will this reducer work on an 11" or 9.25" EdgeHD telescope?

    No. Each EdgeHD reducer is optically matched to a specific telescope aperture to maintain the system's flat-field correction. Using the 14" reducer on a smaller EdgeHD telescope will result in poor image quality. You must use the reducer designed for your specific model.

    How does the .7x Reducer affect imaging the Orion Nebula (M42) with an EdgeHD 1400?

    With the reducer, you can capture the full expanse of the Orion Nebula, including its faint outer wings and the nearby Running Man Nebula (NGC 1977), in a single frame. At the native f/11, you would only be able to frame the core Trapezium region, requiring a multi-panel mosaic to capture the entire complex.

    Is the EdgeHD 1400 Reducer compatible with the Fastar system?

    Yes. The reducer is used on the rear cell of the telescope for f/7.7 imaging. The Fastar system operates independently by replacing the secondary mirror for ultra-fast f/2 imaging. Together, they make the EdgeHD 1400 an incredibly versatile imaging platform, offering three distinct focal ratios in one telescope.

  • Optical Coatings Fully Multi-Coated
    Lens Elements 5-Element
    Compression Factor 0.7x
    Image Circle 42mm
    Optimal Back Focus 146mm (5.75")
    Clear Aperture 60mm
    Connection to Telescope 3.25" Threads
    Weight 3.25 lbs (1.47 kg)

    • Reducer Lens .7x for EdgeHD 1400

      × 1

    • Threaded Metal Dust Cap (Front)

      × 1

    • Threaded Metal Dust Cap (Rear)

      × 1

  • Celestron 2-Year Limited Warranty