The PowerShot SX170 IS camera is equipped with Canon's latest advancements in autofocus (AF) technology. Working on multiple fronts, Canon has developed AF that is significantly faster than on previous models, for a shooting experience that's spontaneous and natural. The extremely responsive High Speed AF lets you capture great shots as they happen, with reduced lag time.
Several engineering breakthroughs contributed to this major enhancement to speed. In addition to improved AF algorithms, the camera can process multiple sequences simultaneously, and takes advantage of reworked controls between AF and the start of shooting.