Full Frame/VV T1.9 to T22 Aperture: Aspherical Element, Reduced Aberrations 0.8 MOD Gears, 300° Focus Rotation: Cooke /i Technology Metadata 80mm Front Outside Diameter: Compact, Lightweight Design Less Reflective, More Tactile Surface: Color Matched Across Series Minimal Breathing and Distortion: Common Series Gearing and Length