The HD PENTAX-DA ★ 16-50mm F2.8ED PLM AW represents Pentax's top of the line STAR series, combining exceptional imaging power and image rendition with outstanding operability and environment- resistant performance which compensates various aberrations to a minimum and delivers sharp, clear images. | The PLM Pulse motor provides high speed focusin. This zoom lens incorporates a newly designed optical system which features a lighter, more compact focus-lens group. By driving this focus-lens group with an advanced PLM (Pulse Motor), it assures smooth, high-speed autofocus operation with minimized operational noise. | Compatible with in body shake reduction of the K series DSLR cameras. The Pentax digital SLR camera K series is equipped with in-body shake reduction SR / SR II. Any lens compatible with the K-series camera can benefit from image stabilization | The rounded aperture blades provide a pleasing bokeh of light particles and does not become polygonal, achieving a natural and beautiful bokeh. | The dust-proof and weater resistant quality of the HD PENTAX-DA ★ 16-50mm F2.8ED PLM AW provides exceptiional performance even in the most demanding shooting conditions - in rain or mist, or at locations prone to splashing water. | Pentax's orginal, Super Protect coating (SP) is applied to the front element of the lens to ensure oil, dust, moisture droplets are minimized and can be easliy revmoved. | With a minimum focusing distance of 0.3m, the HD PENTAX-DA ★ 16-50mm F2.8ED PLM AW lens offers flexibiity in a variety of shooting situations, such as everyday snapshots, landscapes, close-ups, etc. | The conveinent Quick shift focusing system allows for AF fine tune adjustment without removing the lens from its Auto Focus setting | Enhance KAF4 Electromagnetic diaphram control, Compatible with PENTAX K-3 Mark III, K-3 II, K-3, KP, K-70, K-50, K-S2, K-S1, K-1 Mark II, and K-1. Please update the firmware to the latest version to properly use. When mounted on K-1 Mark II and K-1, images can be captured only in crop mode because the camera's image circle is exclusively designed for APS-C format. | [What's in the box] Lens body, lens hood PH-RBN77, lens cap O-LC77, lens case HS120-150, lens mount cap K.