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Cyclops Optics

William Optics Flat6A II 0.8x Adjustable Reducer Flattener (Discontinued)


William Optics Flat6A II 0.8x Adjustable Reducer Flattener (Discontinued)

Shipping Weight:
0.55 KGS
Discontinued, to be replaced by Flat6A-III, please contact for details

Product Description

New Adjustable Flat6All (T-mount not included)

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 Flat6A ll 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
  • Fully Multilayer Coated (FMC) triplet 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


  • 2" Adapter
  • Canon 48mm T-Ring
  • Nikon 48mm T-Ring

Backfocus Adjustment Recommendation

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

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