High-performance autofocus system
The AF drive on the 17-28mm zoom includes an RXD (Rapid eXtra-silent stepping Drive) motor unit to help you stay focused on the action. A sensor that accurately detects the position of the lens enables high-speed and precise AF, which is ideal when shooting continually moving subjects or recording video. Perfect for street shooting and grab shots of groups of friends. And with a focusing system that is both smooth and quiet, the new 17-28mm lets you shoot a video without worrying about picking up ambient drive sounds.
Superior close-up shooting performance
The 17-28mm zoom features a MOD (Minimum Object Distance) of 0.1 9m (7 .5 in) at the wide 17mm end, rendering a maximum magnification ratio of 1:5.2. At the tele end, the MOD is 0.26m (10.2 in) and the maximum magnification ratio is 1:6. You can easily get close for a powerful shot. Plus, you can produce soft expressions with a shallow depth of field distinctive to large-aperture lenses by fully opening the aperture when shooting close to the subject.