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William Optics Adjustable Flattener 6A III
William Optics Adjustable Flattener 6A III
William Optics Adjustable Flattener 6A III
William Optics Adjustable Flattener 6A III
William Optics Adjustable Flattener 6A III

William Optics Adjustable Flattener 6A III

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William Optics

All New Adjustable Flat6AIll (T-mount not included)

PRODUCT DESCRIPTION: Field flattener / X0.8 Reducer. 

This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 to F7.5 ratio refactors. WO Flat 6AIll will provide good illumination and flat field across 97% of full frame sized sensors.

Full frame size 

  • Designed with nearly Full frame chip-size DSLR cameras in mind. 
  • FMC tripllet APO design.
  • Produced entirely with the best Ohara optical glasses. 


  • Reducing factor 0.8X.
  • Adjustable design, for perfect back focus it can be used with other models of refractor
  • 48mm filter ready

Superb Finish
William Optics polished anodized finish.
All internal surfaces threaded and blackened to prevent reflections.

Easy to Use  
Will accept any standard 48mm T-ring for your camera.

Suitable for
GT71, GT81, Z103, Z126.

Adjust Distance

Z71 - 11.8mm
GT71 - 9.3mm
GT81 - 7.9mm
Z103 - 4.6mm
Z126 - 1.4mm



Specifications: William Optics Adjustable Flattener 6A III


Weight: 150g

What's in the Box

What's in the Box: William Optics Adjustable Flattener 6A III

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