Meike MK 16mm T2.2 Large Aperture Manual Focus Prime Low Distortion Mini Cine Lens Compatible with Micro Four Thirds M43 MFT Olympus/Panasonic Lumix Cameras and BMPCC. Wide aperture of T2.2, minimum focusing distance of 20mmThe equivalent focal length is 32mm on M43 bodiesFilter thread size: 77mm, Focus ring rotation: 270°Manual focus: Enable your camera 'release without lens' to let the lens work with your camera.FULLY MANUALPease go to your camera CUSTOM FUNCTIONS and ENABLE release SHUTTER W/O LENS option in order to take picturesLens Consturction:10 elements in 8 groupsLens view angle:diagonal 73° horizontal 61° vertical 47°Weight:490 Grams