The Sony FE 16-35mm f/2.8 GM is a part of Sony's acclaimed G Masters (GM) series of lenses which offer notably high resolution and sharpness with a robust build suitable for photographers and filmmakers alike. Here are the standout features of this wide zoom: • Fast max f/2.8 aperture across the entire zoom range. • Practical and popular wide-end focal range. • Direct Drive Super Sonic wave AF motor and internal focusing with intuitive manual focus control. • Focus Hold Button which allows you to halt your AF exactly on your intended subject. • Dust and moisture-sealed design for inclement weather.