Wide-Angle Zoom.

A staple of wide-angle versatility, the Lumix S PRO 16-35mm f/4 from Panasonic is a wide-angle zoom with a constant f/4 maximum aperture. An optimized optical design incorporates a series of aspherical, low dispersion, and high refractive index elements to control aberrations, color fringing, and distortions for sharp, well-corrected imagery throughout the zoom range.

Complementing the optics is a unique dual-magnet linear motor focusing system, which provides high-speed response and power while remaining compact in size. The lens also features a rounded nine-blade diaphragm, which contributes to the quality of the bokeh, and a weather-sealed construction for working in various weather conditions.