Get a Carl Zeiss Sonnar optical lens for rich imagery that will let you relive memorable moments with the clarity they deserve. The large f/1.8 aperture provides for excellent low-light sensitivity and depth-of-field, while a smooth and quiet Af is great for creating movies. An elegant aluminum alloy exterior with a quietly refined black finish is the perfect match for your E-mount camera. Opt for smooth manual focusing with Dmf, or try defocusing the background with Circular Aperture for beautiful results. Carl Zeiss Sonnar optics This is the first Carl Zeiss lens to be released in the Sony E-mount lineup, employing the legendary "Sonnar" optical design for standout image dimensionality and presence. Aspherical lenses located on either side of the aperture effectively compensate for distortion, while an Ed element suppresses chromatic aberration.