Rokinon 12mm F2.0 NCS CS Ultra Wide Angle Fixed Lens for Olympus and Panasonic Micro 4/3 (MFT) Mount Digital Cameras (Black) (RK12M MFT)

Maximum Diameter: 2.85 inches (72.5mm).Aperture range f20-22 Constructed of 12 elements in 10 groups (2 aspherical lenses) Minimum focusing distance of only 8 inches Lens does not have autofocus Built for Mirror less cameras; takes a 67mm filter size Lens not Zoomable