Circular Aperture: When changing your aperture to defocus the background, the light sources appear blurred. This 'bokeh'
3 Aspherical Lens Elements: Aspherical lens design dramatically reduces spherical aberration while also reducing lens si
ED (Extra-low Dispersion) Glass: ED glass dramatically reduces chromatic aberration and provides superior contrast acros
SSM (Super Sonic wave Motor): SSM is a piezoelectric motor that contributes to smooth and silent AF operation. The motor
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This full-frame ZEISS Vario-Sonnar wide-angle zoom lens covers a 16mm to 35mm range with a constant maximum aperture of F2.8, enabling consistent depth of field and exposure settings at any focal length. The high-performance optical design boasts ZEISS T* (T-star) coating for superior contrast and resolution, three aspherical elements with outstanding surface precision for low distortion and corner to corner sharpness - even at wide-angles, plus 1 ED (Extra-low Dispersion) glass elements and 1 Super ED element to reduce chromatic aberration to an absolute minimum. The SAL1635Z2 employs Sony's SSM (Super Sonic Wave Motor) for extremely fast and accurate AF (auto focus). Silent AF and iris (aperture) drive is employed for movie capture and a 9-blade circular aperture for beautiful defocussed backgrounds. Ideal for Full-Frame and APS-C A-mount cameras.