Brand: VILTROX Model: AF33/1.4E Mount type: Sony E mount (for compatible models, please refer to the picture in Chapter 2, or chat with customer service) Focus method: auto focus Frame: APS-C frame (please set the camera to APS-C mode before using the full frame camera, otherwise there will be vignetting) Lens configuration: 10 elements in 9 groups Focal length: 33mm Viewing angle: 45.7° Focus range: 0.1m~∞ Maximum aperture: F1.4 Minimum aperture: F16 Aperture blade: 9 pieces Gear size: 1/3EV (22 gears) Focus system: internal focus Focus motor: STM+ lead screw type Magnification: 0.1 times Filter diameter: Φ52 Size: Φ65mmX72mm Weight: 270g The focal length of this lens is equivalent to the focal length of 50mm, suitable for a wide range of scenes, including: portrait, scenery, interior, architecture, night scene, etc. High resolution and soft focus out of focus The STM stepping motor with gear-type unit provides a quiet auto-focusing experience and does not easily interfere with movie shooting Support eye-controlled focus, easily identify and track the subject 9 groups of 10 optical structures, 1 ED lens and 1 high refraction lens, adopts high-definition nano multilayer coating, front lens waterproof and antifouling coating Dual adjustment of the iris: automatic camera adjustment and manual adjustment at the bottom of the lens Support USB firmware upgrade Precision metal structure, brass metal buckle, durable