This lens’s most prominent feature is its outstanding portability. The rear focus system delivers sharp, clear images starting with the maximum aperture. The rapid, quiet, and accurate autofocusing is complemented by a full-time manual focus for subtle adjustments. When taking portraits even such fine adjustment as moving the focus from the tips of the eyelashes to the eye itself is possible, creating a subtle yet definite change in expressive tone. The natural soft blur effect is very attractive, and the lens’s operability is outstanding, with a constant lens length as well as a non-rotating front lens group to make using circular polarizing filters even easier.