Tokina Firin 20mm F2 FE MF Overview

Manufacturer description: The Tokina FiRIN is a manual focus lens for full-frame Sony mirrorless cameras. It has manual aperture control but transmits distance and aperture information to the lens allowing the camera to utilize the 5-axis Image Stabilization, Manual Focus Assist, and other features that require electronic lens communication. The FiRIN 20mm f/2.0 features a wide focus ring for smooth manual control, an aperture ring that can be "clicked" and "de-clicked" on demand for cinema and photo use, and electronic contacts for maximum communication with the camera.