The Panasonic Lumix S PRO 70-200mm f/2.8 O.I.S. is an L-mount telephoto zoom Lens. It is characterized by its bright f/2.8 constant maximum aperture and sophisticated optical and focusing performance. The optics layout incorporates several aspherical and low dispersion elements in order to minimize chromatic and spherical aberrations throughout the zoom range for higher clarity, sharpness, and accurate rendering. A double focus system employs both a linear motor and a stepping motor to deliver impressively fast, precise, and quiet autofocus performance. A focus clutch mechanism has also been incorporated, which allows for near-instant AF/MF switching. Focusing system has been designed to suppress focus breathing for greater versatility when used for video applications. Optical Image Stabilizer minimizes the appearance of camera shake b for sharper handheld shooting, and also supports the Dual I.S. and Dual I.S. 2.0 functions for increased stabilization performance up to approximately seven stops. Its Splash, dust, and freezeproof design benefits working in inclement weather conditions down to -14°F. Additionally Rounded 11-blade diaphragm contributes to a pleasing bokeh quality. This lens is Compatible with optional DMW-STC14 and DMW-STC20 teleconverters to further extend the reach of this lens. Removable rotating tripod collar with Arca-type dovetail is included and benefits working with the lens atop a tripod or monopod.