Pentax HD DA - 11.15cm 5.5x

With its zoom coverage of approximately 5.5 times, this lens offers focal-length coverage from 84.5 medium telephoto to 460 mm super telephoto (in the 35 mm format), making it ideal for use with a wide variety of subjects and applications including portraits, sports, events and wildlife. It incorporates two ED (extra-low dispersion) glass elements in its optics to effectively compensate for chromatic aberrations over the entire zoom range and deliver well-defined, true-to-life images.
The lens features weather-resistant construction to prevent the intrusion of water and moisture into the lens barrel. When the lens is mounted on a PENTAX weather-resistant digital SLR camera body, the user is assured of greater durability and reliability when shooting in rain or mist, as well as at locations subject to a spray or splash.