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Orion Telescopes
Celestron f/6.3 Reducer-Corrector for Schmidt-Cassegrain
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  • Reducer shortens the effective focal length of Schmidt-Cassegrain telescope optical system by 37%
  • Converts f/10 optical system to faster f/6.3 for a significantly wider field of view
  • Shortens exposure times for astrophotography by 2.5 times
  • Four-element, fully multi-coated optical design with 41mm clear aperture
  • Threads into rear cell and works with any brand and size of Schmidt-Cassegrain telescope except Celestron EdgeHD optical systems.

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Item #  05120
Mfg Model #  94175

This nifty optical element shortens the effective focal length of Schmidt Cassegrain telescopes by 37%, converting the standard f/10 optical system to a "faster" f/6.3 system (f/7 for the Celestron 14" SCT). The result is a wider field of view, to better frame deep-sky objects that may not fit within the narrower field of view at f/10. The shorter focal length also reduces exposure times for astrophotography and CCD imaging by 2.5 times!

This device also corrects for field curvature and other aberrations inherent in the telescope's optical system. Stars appear pinpoint sharp from one edge of the field to the other. The Celestron F/6.3 Reducer/Corrector features a four-element, fully multi-coated optical design with a 41mm clear aperture. The Reducer/Corrector Lens is not compatible with Celestron EdgeHD optical systems.Threads onto rear cell.


This product is serviced and supported by its manufacturer according to the terms and conditions included in the packaged product. Orion's limited warranty does not apply. Please contact the manufacturer directly for technical support.


Please note this product was not designed or intended by the manufacturer for use by a child 12 years of age or younger.

  • Coatings
    Fully multi-coated
  • Number of elements
  • Clear aperture
  • Mounting
  • Mechanical profile
  • Weight (oz.)
  • Dimensions
    1.3 in. x 2.2 in.
  • Warranty
    Two year

Orders received by 1pm Eastern Standard Time for in-stock items ship the same business day. Order received after noon will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.


This product is available to ship Standard delivery within the 50 US states, APO/DPO/FPO addresses and US territories/protectorates. Delivery is not available to Canada.

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