Sony 16-35mm F/2.8-22 for Sony/Minolta Alpha Cameras Wide-Angle Lens Fixed Zoom SAL1635Z2 ZEISS T* coating delivers superior contrast and resolution, Constant F2.8 max aperture maintains exposure/depth of field, 3 Aspherical lenses for low distortion and corner sharpness 2 Extra Low Dispersion elements reduce chromatic aberration (1Super ED), Silent AF and iris (aperture) drive ideal for movie capture, Dust and moisture resistant design for maximum durability 9-blade circular aperture for beautiful defocussed backgrounds, Ideal for Full-Frame and APS-C A-mount cameras, Improved Internal focusing system - 4x faster subject tracking