Celestron f/6.3 Focal Reducer/Corrector Lens

Item #CELE186-1

  • List Price:
  • $144.95
  • Your Price:
  • $119.98
  • You Save:
  • $24.97 USD18% + FREE Shipping
  • Converts f/10 SCT telescopes to f/6.3
  • The f/11 C14 becomes and f/7
  • Threads on to rear cell of SCT Telescopes
  • A must for serious astrophotography with SCT scopes
Questions? Let our experts help!
  • Description

    Celestron Reducer/Corrector f/6.3


    This combination focal reducer and field corrector lens accessory works with all Celestron 5", 8", 9 1/4", 11" and 14" Schmidt-Cassegrain telescopes. This clever accessory makes it possible to have a dual focal ratio instrument, without sacrificing image quality. The Reducer/Corrector is f/6.3 for C5, C6, C8, C9¼ and C11 telescopes and f/7 for the C14 telescope.


    If offers wide fields of view with any Schmidt-Cassegrain telescope. Used for astrophotography, it reduces exposure time by a factor of 3.


    Celestron doesn’t offer a f/6.3 Schmidt-Cassegrain telescope, because the design is impractical, with a large central obstruction, and resulting loss in contrast. This, added to the inability to utilize longer focal ratios for certain objects, led Celestron to design the four-element, fully multicoated f/6.3 Reducer/Corrector. Results are amazing both visually and photographically.

    Supplier SKU


    Shipping Restrictions

    Available for shipment to the USA and Canada only.

  • Dimensions & Specifications

    Telescope Accessories Series

    Celestron Photographic / Visual Accessories



    International Shipping


  • Product Guarantee

    We stand behind all the products we sell, and your satisfaction is our top priority. If you're not satisfied with the quality of your purchase, simply send the item back to us in its original packaging within 30 days of its delivery.

    Manufacturer Warranty

    Celestron has a limited lifetime binocular and spotting scope warranty and all other products have a 2 year manufacturer's warranty covers against defects is provided. If you have specific questions about this product's warranty please contact Celestron's Customer Service department at 310-328-9560.

    Return & Exchange Policy

    At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.

Customer Q&A

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  • Q1: 1. How does the reducer connect to a Celestron Nexstar 5\ Smt.Cass.? 2. Also, can this item also be used at the same time that a rear mounted light pollution filter is being used? Thanks"

    A: The reducer corrector will fit right on the back of the scope itself. Because of where it is on the scope you can definitely use it in conjunction with a light pollution filter.

  • Q2: Can i use the reducer with my NexImage camera and with normal eyepieces (1,25\)??"

    A: The Celestron Reducer/Corrector f/6.3 can be used both for visual observation and astrophotography with the NexImage imager.

  • Q3: Is that reducer compatible with the new nexstar c6?

    A: It should work fine with the C6-S.

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