Antares f/6.3 Focal Reducer for Schmidt-Cassegrain Telescopes

Our Price: $85.00
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Out of Stock
Availability: Item has been discontinued by Agena and we no longer carry this item
Manufacturer SKU: SCTFR
Item Can Ship: Worldwide
Antares f/6.3 Focal Reducer for Schmidt-Cassegrain Telescopes

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Product Details

Antares' f/6.3 focal reducer provides a faster f/6.3 system for imaging or visual use when used with an f/10 SCT or other compatible telescopes. This filter threads on to the rear cell of your Celestron or Meade SCT telescope. The female end attaches to the rear cell of the telescope. All additional accessories mount onto the exterior/male threads. The reducer features fully coated optics in an anodized aluminum filter ring with an ergonomic rubber grip. It features a standard male SCT thread (2" OD, 24 TPI) on one side and a standard SCT female thread on the other.

This is one of our best-selling items, and customers have reported that this product is at least as good as, and probably better than, other leading f/6.3 focal reducers sold on the market for a lot more. However, even though the imprint on the item states "Reducer / Corrector" please note that his is a reducer only. It is not a corrector or flattener.


  • Focal length = 220mm
  • Clear aperture = 40.8mm (1.60") 
  • Length of male SCT thread = 5mm (0.2") but this is preceded by an unthreaded part on the eyepiece side making the total length = 8.8mm (0.35") 
  • Length of female SCT thread = 7.5mm (0.3") 
  • Weight = 4.3oz.
  • Made in Canada

Please note:

  • A couple of tiny dust particles between lens elements, uneven lens edge blackening, very minor coating blemishes, or even a very small fine lens scratch or two are very common in this Antares product and must be accepted as normal for this item. However, these will not impact optical performance.
  • A few people have reported issues with the male SCT thread diameter on this item being a bit larger than necessary. We have tested our current batch and it works with Meade, Celestron, and Baader SCT accessories. However, it will not thread into William Optics accessories, and with GSO it is a hit or miss. Hence, there is a chance that you may not be able to thread your SCT diagonal or other SCT accessory on to this reducer for these or for any other brand. In such cases, we will be happy to take the item back as per our standard return terms.

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