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William Optics Flattener 68III

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William Optics

William Optics Flattener 68III Full Frame 1x Flattener

William Optics Flattener 68III brings imaging to a next level of adjustability and image quality. You will gain from the interchangeable design across many William Optics Telescopes with this one Reducer Flattener.

FMC Triplet APO design produced with the best Ohara Optical glass.

William Optics Flattener 68III is full frame ready.

William Optics Flattener 68III features adjustable tuning ring for fine adjustment of the spacing for different telescopes.

This accessory is a must-have for refractor astrophotography.


  • Designed to cover full size DSLR cameras with clear lens aperture of 50 mm
  • STM coated with an excellent doublet air spaced design.
  • Produced entirely with the best Ohara optical glasses.
  • Flattener Power: 1x (no reduction).
  • 45mm for full illuminated imaging circle.


  • It will flatten the field amazingly well and finally make you see those stars round!
  • This unique flattener works with William Optics or other 6-7.5 F ratio refractors.

Superb Finish

  • Superb William Optics anodized finish.
  • All internal surfaces threaded and blackened for no reflections.
  • Protecting covers are included on both sides.

Easy to Use 

  • Will accept any standard T-ring for your camera (thread size M48x0.75).
  • Suitable for FLT 91, FLT 120, FLT 132, FLT156, GT 153, GT 102 (with 3" focuser) and many others refractors with focuser M92x1.0 thread.

William Optics Flattener 68III Image Frame

William Optics Flattener 68III Adjustability

William Optics Flattener 68III Threads


Specifications: William Optics Flattener 68III

What's in the Box

What's in the Box: William Optics Flattener 68III

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