Sony 16-35 GM 2 F2.8

Focal Length: 16-35mm • Aperture: Constant f/2.8 • Optical Construction: 15 elements in 12 groups, including three XA (extreme aspherical) elements, one aspherical element, one ED aspherical element, one Super ED element, and two ED elements. • Aperture Blades: 11 rounded blades • Minimum Focus Distance: 0.22 meters • Maximum Magnification: 1:3.1 • Dimensions: 87.8 mm (diameter) x 111.5 mm (length) • Weight: 547 grams • Filter Size: 82mm • Autofocus System: Four XD linear motors for fast and precise focusing • Additional Features: • De-clickable aperture ring • Focus hold button • Dust and moisture-resistant design • Fluorine coating on front element • Petal-shaped, bayonet-type lens hood included