William Optics

Flat6AIII Adjustable 0.8 Reducing Flattener

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Product Overview

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 6Alll 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 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, Z81

Adjust Distance

GT71 7.1mm
GT81 5.1mm
Z81 3.2mm
Z103 0.5mm


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