A 37% weight reduction to just 410g transforms this constant f/2.8 zoom into an effortless daily carry without sacrificing its rugged, weather-sealed build. The redesigned optics, featuring an ED element and 11-blade iris, resolve 40.2-megapixel detail while delivering smoother bokeh for a cinematic look. This lens is best for travel and landscape photographers using high-resolution X Series bodies who need a lightweight, all-purpose zoom that performs like a set of primes.