Overview The Canon 1242B002 is an EF-S 17-55mm f/2.8 IS USM zoom lens designed for Canon APS-C DSLR cameras. Offering a versatile focal range equivalent to approximately 27-88mm on full-frame bodies, it allows seamless transitions from wide landscapes to flattering portraits without the need to change lenses. The constant f/2.8 aperture ensures bright and consistent exposure throughout the zoom range, making it well suited for shooting in low-light conditions and creating images with a shallow depth of field. Key features Constant f/2.8 aperture maintains brightness and supports faster shutter speeds in dim environments Ultra-Low Dispersion and molded aspherical lens elements reduce chromatic aberration and distortion for sharp, true-to-life images Integrated Image Stabilizer compensates for up to three stops of camera shake, enhancing handheld shooting stability Ring-type Ultrasonic Motor (USM) delivers fast, quiet autofocus with full-time manual focus override for precise control 77mm front filter thread compatible with common polarizing and neutral-density filters for creative flexibility Robust yet manageable build quality designed for extended use in various shooting scenarios Key specs Focal length: 17-55 mm (equivalent to 27-88 mm on full-frame) Maximum aperture: f/2.8 constant throughout zoom range Lens construction: Includes Ultra-Low Dispersion and molded aspherical elements Image stabilization: Optical Image Stabilizer with up to 3 stops compensation Autofocus motor: Ring-type Ultrasonic Motor (USM) with full-time manual focus Filter size: 77 mm Connectivity and compatibility This lens is specifically designed for Canon APS-C DSLR cameras with an EF-S mount. It fits seamlessly on compatible Canon bodies, providing an effective focal length range ideal for everyday photography, travel, and event coverage. The 77mm filter thread supports a wide range of standard filters, allowing photographers to adapt to different lighting and creative needs. Ideal uses and environments Thanks to its bright aperture and image stabilization, this lens performs well in indoor settings, evening events, and shaded outdoor locations where lighting can be challenging. Its focal range covers wide-angle scenes and short telephoto portraits, making it a strong choice for hobbyists and professionals alike who require a reliable walk-around lens for landscapes, portraits, travel, and documentary work.
