Full-frame wide-angle lens offering excellent image quality in a compact and lightweight design.; STM autofocus motor delivering fast, accurate, and quiet autofocus performance that is compatible with Sony's Eye AF autofocus mode.; Bright f/ 1.8 maximum aperture well-suited for working in low-light conditions while also providing precise control over the focus position when using shallow depth of field techniques.; 11 lens elements in 9 groups provide a sophisticated optical design allowing the lens to maintain excellent resolution throughout the entire focusing range.; Minimum focusing distance of 14.6" allows for dynamic wide-angle imagery of close-up objects.