An entirely new lens which joins Canon's existing 28-105 f/3.5-4.5 USM in the line-up. It's the smallest and lightest zoom in the 28-105 class, and its new optical system includes an Aspherical element. Most noteworthy is its new Micro USM II, half the size of previous Micro USMs, and its use of internal focusing (no front element rotation during focusing).
