This high-performance standard lens has the equivalent angle of view as a 38mm lens (35mm equivalent focal length) on the Micro Four Thirds system & 28.5mm (35mm equivalent focal length) on the E-mount sytem. Three glass mold aspherical lenses provide excellent correction for distortion & field curvature. The inner focusing system corrects the fluctuation of aberration to maintain image quality regardless of the focusing position. Sigmas Super Multi-Layer Coating reduces flare & ghosting & provides high contrast images. The superior telecentric optical design improves the image quality throughout the frame. This lens benefits from a newly developed linear AF motor which moves the lens units directly without the need for gears or the drive of other mechanical parts. This system ensures accurate & quiet autofocusing, making the lens suitable for video recording as well as still photos. Wide-angle lens designed exclusively for mirrorless interchangeable lens cameras. This high-performance wide angle lens has the equivalent angle of view as a 38mm lens (35mm equivalent focal length) on the Micro Four Thirds system & 28.5mm (35mm equivalent focal length) on the E-mount sytem. The compact & lightweight construction guarantees excellent mobility making it ideal for many types of photography. Superior image quality Three glass mold aspherical lenses allow the lens to be compact & lightweight, & provide excellent correction for distortion & field curvature. It provides high image quality throughout the frame. The inner focusing system corrects the fluctuation of aberration to maintain image quality regardless of the focusing position. Super Multi-Layer Coating Sigmas Super Multi-Layer Coating reduces flare & ghosting & provides high contrast images even in backlit conditions. Superior telecentric optical design The superior telecentric optical design improves the image quality throughout the frame. Newly developed linear AF motor This lens benefits from a newly developed linear AF motor which moves the lens unit directly without the need for gears or the drive of other mechanical parts. This system ensures accurate & almost silent autofocusing, making the lens suitable for video recording as well as still photos. The AF unit is controlled by electromagnetics meaning it will only operate when power from the camera is sent to the lens. If the lens is not attached to the camera or the camera is switched off, the AF unit will move freely inside the lens. Rounded diaphragm The lens features a rounded 7 blade diaphragm creates an attractive, smooth blur to the out-of-focus parts of the image. Convenient handling The wider focus ring ensures enhanced usability when manually focusing. Minimum focusing This lens has a minimum focusing distance of 20cm & a maximum magnification ratio of 1:7.4.