Canon EF-S 17-55mm f/2.8 IS USM Zoom Lens

The Canon EF-S 17-55mm f/2.8 IS USM Lens is a large-aperture lens specifically designed for EF-S type digital SLR cameras, and that offers a super wide angle to short telephoto zoom range, with built-in Image Stabilization. The focal length is equivalent to approximately 27-88mm in 35mm format.

This lens features a fast f/2.8 Maximum Aperture and Canon's latest optical Image Stabilizer technology, providing up to 3-stop compensation for image blur caused by camera shake and slow shutter speeds. This ensures clear, crisp images, even in dim light.

Designed specifically for digital photography, the lens has specially shaped lens elements and Super Spectra coatings to suppress ghosting and flare, which can be caused by reflections off digital camera sensors.

Key Features:

• Uses optics designed to take full advantage of the small image circle and short back focus in EF-S lenses
• Features three aspherical lens elements (two types) as well as a Super-UD glass element for high image quality at all focal lengths
• Optimized lens coating minimizing flare and ghosting prone occurring with digital cameras
• Ring-type USM provides ultra-quite, super-fast, precision auto focusing and predictive tracking
• Inner Focusing and new AF algorithms, with full-time mechanical manual focusing
• Circular aperture diaphragm produces brilliant out-of-focus characteristics

Canon’s Image Stabilizer (IS) technology makes handheld photography possible in more low-light situations than ever before. When camera shake occurs using normal lenses without image Stabilizer technology, the image projected to the focal-plane also shakes, often resulting in blurred images at shutter speeds less than 1/focal length. When this same movement occurs with an IS lens attached, a special group of lens elements automatically shifts its position, thereby compensating for the shake and stabilizing the image.