The Lumix S PRO 70-200mm f/4 O.I.S. from Panasonic is an L-mount telephoto zoom featuring an f/4 constant maximum aperture. A sophisticated optical design is employed, which incorporates a series of aspherical, low dispersion, and high refractive index elements, to control a variety of aberrations, colour fringing, and distortion for sharp, clear, well-corrected imagery throughout the zoom range. Telephoto zoom is designed for full-frame L-mount mirrorless cameras, however, it can also be used with APS-C models where it provides a 105-300mm equivalent focal length range. Constant f/4 maximum aperture maintains consistent illumination throughout the zoom range. A double focus system employs both a linear motor and a stepping motor to deliver impressively fast, precise, and quiet autofocus performance. Optical Image Stabilizer minimizes the appearance of camera shake for sharper handheld shooting, and also supports the Dual I.S. and Dual I.S. 2.0 functions for increased stabilization performance. Splash, dust, and freezeproof design benefits working in inclement weather conditions down to -14°F. Rounded nine-blade diaphragm contributes to a pleasing bokeh quality. Removable rotating tripod collar is included, and it benefits working with the lens atop a tripod or monopod.

Panasonic Lumix S PRO 70-200mm F/4 Specs