IN CAMERA SHAKE REDUCTION (SR): The PENTAX digital SLR K series cameras are equipped with the SR mechanism built into the camera body; Because shake reduction is applied in the camera body, this means that any lens compatible with the K Series cameras will benefit from image stabilization High performance standard zoom lens: This lens is for use with the Pentax k mount digital SLR cameras, providing exceptional imaging power and a large F2. 8 maximum aperture HD coating to enhance imaging power: produce high contrast images with edge to edge sharpness, free of flare and ghost images Exceptional imaging power: the newly designed optics feature three ED optical elements to accommodate super high resolution image sensors; These delivers high resolution images with uniform image Description over the entire image field Weather resistant construction: this lens features a Dependable weather resistant construction with special seals to effectively prevent the intrusion of water into the lens interior Built in sum (Supersonic direct drive motor): thanks to the incorporation of a new generation sum, this zoom lens assures quiet, high speed auto focus operation, allowing the photographer to react swiftly to all types of subjects Rounded diaphragm: rounded diaphragm to produce a smooth, beautiful bokeh (defocus) effect, while minimizing the streaking effect of point light sources Super protect coating: Pentax original SP coating uses fluorine treatment on the front surface of the lens; This prevents adhesion of dust, water drops, grease and other substances Quick shift focus system: allows the user to instantly switch to manual focus operation after the subject is captured in focus by the camera’s AF system WHAT'S IN THE BOX: Includes Front lens cap, lens mount cap, Lens Hood PH RBD82 and Lens case S120 150