A 14-element optical design with three aspherical and two ED elements delivers edge-to-edge sharpness on medium-format G Mount bodies, paired with a fast, quiet linear AF motor. Its constant f/4 aperture and weather-sealed build provide consistent exposure and reliable handling across the 25-51mm equivalent zoom range. This lens is best for street and professional photographers who need a durable, high-resolution standard zoom for diverse shooting conditions.
