The Olympus M.ZUIKO Digital 25mm f/1.8 is a fast standard prime lens for the Micro Four Thirds system. Offering a 25mm focal length that’s equivalent to 50mm in 35mm terms, a bright maximum aperture of f/1.8 and a silent auto-focus motor, the M.ZUIKO Digital 25mm f/1.8 is well suited to unobtrusive street photography, and is also a good candidate for a general-purpose walk-around lens. Comprising 9 elements in 7 groups, including two aspherical elements, and boasting an iris diaphragm with 7 rounded blades for a smooth bokeh, the Olympus 25mm f/1.8 also has a ZERO (Zuiko Extra-low Reflection Optical) coating to reduce flare and ghosting effects.