• Stylish triplet designed 2" APO Field Flattener for WO Z71 refractor. This 0.8x reducer has been made to enhance the flat-field imaging efficiency of William Optics 66-80 mm refractors with f/6 focal ratios, in contrast with other refractor brands. Provides excellent illumination and flat field for sensors APS sized and smaller. Flattens the field incredibly well, allowing you to finally see those stars round. Comes with a Canon EOS T-ring and Z71 spacer.

    APS Size

  • Designed for APS chip-size DSLR cameras.
  • FMC doublet design.
  • Made completely with the finest Ohara optical glass.



Rotating T-ring thread for 35 mm cameras. Includes Canon EOS T-ring. Accepts any regularly used T-ring camera adapter.

Superb Finish

Elegant William Optics anodized finish. Every internal surface is threaded and blackened to prevent reflections.


Galaxy, the Double Cluster, or the star clouds in Sagittarius in one sweep! With an Expanse in your focuser, you can!

This 15mm focal length Expanse ocular has a big eye lens to peer into and comfortable 13mm eye relief.  Eyeglass wearers can view the entire field without removing their glasses. All eyepiece elements are fully coated, with the outer lens multi-coated for additional light transmission. The 1.25" aluminum barrel is threaded for filters and internally blackened to eliminate internal scattering. And its fold-down rubber eyeguard enhances contrast by blocking stray light.

With our Expanse eyepieces you get a super wide field of view and superior optical performance. And check out the price. You also get a bargain!

William Optics Flat6A APO Flattener for Z71

SKU: p-f6a-z71
C$227.00 Regular Price
C$136.20Sale Price

    Prices are in Canadian Dollar

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