The 17 to 55 mm zoom range of the Canon EF-S 17-55mm f/2.8 IS USM – Photographic lens offers outstanding flexibility and provides exceptional image quality for landscapes, portraits and travel. The f/2.8 aperture remains constant throughout the focal range, so you can use the zoom without slowing down the shutter speed. With rapid focusing from Ultrasonic Motor (USM) technology, you can move between roads and wide vistas, capturing subjects without interruption. The 3-stop optical image stabilizer and wide aperture reduce camera shake and allow you to shoot handheld in low light or take night photos without using flash. Optimal flash readout in every shot, as this lens transfers distance information to the camera’s E-TTL II flash system. It is also compatible with all Canon EOS digital SLR cameras with an APS-C sensor and the Canon EOS M series of mirrorless cameras that use the EF-EOS M adapter.