The M.Zuiko Digital ED 7-14mm f/2.8 PRO from Olympus is a 14-28mm equivalent lens featuring a constant f/2.8 maximum aperture for consistent performance throughout the zoom range. A suite of aspherical, extra-low dispersion, and high-refractive index elements are featured within the optical design and help to minimize spherical and chromatic aberrations throughout the zoom range for increased clarity and sharpness. Additionally, a ZERO coating has been applied to control flare and ghosting for improved contrast and color fidelity. A weather-resistant design benefits handling in trying conditions while an L-Fn button offers lens-based control over various settings. As a fast, high-performance wide-angle zoom, this Micro Four Thirds lens pairs an optimized optical layout with refined physical details to excel in a variety of working conditions. Constant f/2.8 maximum aperture maintains consistent performance throughout the zoom range and benefits working in difficult lighting situations. A ZERO (Zuiko Extra-low Reflection Optical) coating has been applied to individual elements to minimize lens flare and ghosting for improved contrast and color fidelity when working in strong lighting conditions. Programmable L-Fn (lens function) button for easily accessible settings adjustment. A built-in petal-type lens hood helps to alleviate stray light from causing flare and also adds some protection from accidental impacts to the front element.