WO FF68III revolutionary, adjustable field flattener for refractor with light in the range of 6-7.5.

Full description and technical drawings on the manufacturer's website https://williamoptics.com/new-william-optics-flattener-68iii

Technical specifications

• compatibility: FLT 132, 102GTS (with 3 "hood), other refractors with M92x0,1 mount
• thread on the camera side: M48x0.75
• designed for full-frame cameras and camcorders with a clean aperture of 50 mm
• construction: doublet with air gap
• glass: Ohara
• fold: 1x (without focal length)
• full illumination in a circle with a diameter of 45 mm
• high quality workmanship and finishing: CNC + anodizing and blackening