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Agena 1.25" 0.63x Focal Reducer with C / CS Mount

4.0 (1 Reviews) Read Reviews Write Review
Brand Agena AstroProducts
Part Number OFR-AG-CFR
Availability available

Product Info

Manufacturer Description


  • C / CS mount focal reducer for imaging applications
  • Provides a reduction of 0.63x when directly coupled with C mount cameras
  • Allows you to effectively reduce focal length of telescope and reduce exposure times
  • Features a 1.25" barrel on one side and a male C / CS mount on the other side


  • Two lens cemented optical system for better correction
  • Fully broadband multi-coated optics
  • Very low profile
  • 1.25" barrel is threaded to accept standard 1.25" (M28.5x0.6 thread specification) astronomy filters


  • Native reduction provided is 0.63x when reducer is directly coupled with C-mount cameras (approx. 0.68x with CS-mount cameras)
  • Reduction factor can be varied by changing the distance between the reducer and the camera sensor
  • Addition of a 0.5" C mount spacer (not included) increases reduction factor from 0.63x to 0.5x.
  • Addition of a 1" C mount spacer (not included) increases reduction factor to 0.34x.


  • Optical clear aperture = 22.45mm / 0.88"
  • Weight = 0.9oz


4.0 (Based on 1 Reviews) 100% of reviewers recommended this product.
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      User Notes:
      Review by Norm of Kansas.
      Nov 16, 2013

      4.0 Works as advertised


      Quality Lenses


      Wrong Size Barrel


      Works great, be sure to order the 1.25 dia X 1" thread-in extension tube. (Blue Fireball 1.25" Spacer Ring with 1" Extension)

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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