The HD PENTAX DA 16-85mm F3.5-5.6 ED DC WR is optimized to provide premium performance for use on PENTAX K-mount digital SLR cameras. Catering to the needs of the photographer, this lens provides a high zoom ratio of approximately 5.3 times to cover focal lengths from 16mm ultra-wide-angle to 85mm telephoto for lengths equivalent to 24.5mm to 130mm (in the 35mm format). This versatile zoom lens comes in handy for a wide variety of scenes and subjects, including sweeping landscapes and cramped rooms. Equipped with the PENTAX-exclusive, HD coating, this lens is sure to offer sharp, clear images even under challenging light conditions.