Carl Zeiss&174; Sonnar optics This is the first Carl Zeiss&174; lens to be released in the Sony E-mount lineup, employing the legendary Sonnar" optical design for standout image dimensionality & presence. Aspherical lenses located on either side of the aperture effectively compensate for distortion, while an ED element suppresses chromatic aberration. The overall result is excellent corner-to-corner sharpness even with the aperture wide open, for impressive overall resolution. Circular Aperture The SAL24F18Z features seven aperture blades that form a near circle. This result in a pleasing defocused circular effect on the background of your image when the aperture is set wide open. Large f/1.8 aperture The large f/1.8 aperture is an ideal choice for shooting interiors in low light, as well as for superb background defocusing. Despite being a wide angle lens, The SEL24F18Z allows for...