Versatile Wide-Angle Zoom. The Panasonic 16-35mm f/4 S PRO covers a versatile, popular range of focal lengths that makes it great for landscapes, cityscapes, and large group shots, among other applications. Using an APS-C camera? You’ll get a 24-52.5mm equivalent focal-length range.

L-Mount Alliance. This wide-diameter lens mount is a joint collaboration between Leica, Panasonic, and Sigma that’s focused on a line of premium cameras and lenses in a mirrorless format. At 51.6mm mount diameter and just 20mm flange distance, the L-mount is well-suited for fast-aperture full-frame optics with compact dimensions.

Linear Motor Autofocus System. This lens’s autofocus system uses a linear motor to provide fast, accurate, nearly silent autofocus performance for still and video use. There’s a focus clutch mechanism that allows for almost instant AF/MF switching.

Constant f/4 Aperture. The constant f/4 maximum aperture gives you consistent illumination throughout the lens’s zoom range. The rounded nine-blade diaphragm contributes to a pleasing bokeh quality.

Advanced Optics. The nine-group/twelve-element optical formula includes three aspherical elements, one ultra-high refractive index element, and one extra-low dispersion element to reduce chromatic aberrations and distortion.