Ricoh announced the HD Pentax-DA 16-85mm f/3.5-5.6ED DC WR zoom lens, designed for use with Pentax K-mount D-SLR cameras. The lens consists of 16 optical elements in 12 groups and features an ED (Extralow Dispersion) optical element to compensate for chromatic aberrations, and aspherical optical elements to minimize colour bleeding. The lens offers a focal length of 16-85mm (24-130 in the 35mm format) and can be used for different genres of photography, including landscapes and portraits. This lens features HD coating which delivers clear images and reduces flare and ghosting, even under back-lit conditions. It also features 11 sealings that prevent water from getting into the interiors of the lens.