Celestron f/6.3 Focal Reducer/Corrector Lens

Item #CELE186-1

Free Shipping with Economy Service

or get it as soon as Thursday with FedEx 1 Day when you buy today View All Shipping Options
  • Reduce the focal ratio and expand your telescope's field of view for visual observing or astroimaging
  • Converts f/10 Schmidt-Cassegrain telescopes to f/6.3 (f/7 for 14" models)
  • Threads on to rear cell of Schmidt-Cassegrain telescopes
  • An essential accessory for serious astrophotography with SCTs
  • Description

    Enjoy wider fields of view with your existing Schmidt-Cassegrain telescope with the Celestron f/6.3 Reducer Corrector. This lens assembly takes your Schmidt-Cassegrain from its native f/10 focal radio down to f/6.3 (f/7 for 14" models). The result is wider, brighter images. All four lens elements within the reducer are fully multi-coated to maintain image quality.

    The Celestron f/6.3 Reducer Corrector is a must-have accessory for astrophotographers. Adding this accessory reduces exposure times by a factor of 3, allowing you to collect more light for brighter, more detailed images in a fraction of the time.

    Note: This reducer is compatible with 5", 6", 8", 9.25", 11" and 14" (at f/7) Schmidt-Cassegrain telescopes. It is not compatible with EdgeHD telescopes. Celestron has created specialized EdgeHD focal reducers that are specific to your telescope size.

    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 warrants all of its products to be free from defects in materials or worksmanship. Celestron offers a limited lifetime warranty for binoculars and spotting scopes. All other products have a 2-year manufacturer's warranty, which covers repairs or replacement in cases of defective components. 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

1 - 5 of 12
1 2
  • 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.

1 - 5 of 12
1 2