The M.Zuiko Digital ED 75-300mm f/4.8-6.7 II from Olympus is a 150-600mm equivalent lens for Micro Four Thirds mirrorless cameras. The optical design makes use of three low dispersion elements and three high refractive index elements to control both chromatic and spherical aberrations for a high degree of clarity and sharpness throughout the zoom range. Additionally, this lens utilizes a Movie & Stills Compatible AF system to achieve smooth, fast, and near-silent focusing performance to benefit both photo and movie applications. One Super ED (extra-low dispersion) and two ED elements help to reduce chromatic aberrations and color fringing throughout the zoom range for improved clarity and color accuracy. 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. Rounded seven-blade diaphragm contributes to a smooth bokeh quality.