Adding to its trademark line of esteemed digital cameras, Canon U.S.A., Inc. today announced the release of four new feature-packed PowerShot digital cameras: the PowerShot G16, PowerShot S120, PowerShot SX510 HS and PowerShot SX170 IS. Designed to help photo enthusiasts create high-quality images and videos, these cameras feature advanced DIGIC imaging technology to deliver superb image quality in portable, compact digital camera bodies. In addition, all four models have the ability to achieve faster autofocusing speeds than was possible with previous PowerShot models…