Canon EF 70-300mm f/4-5.6 IS USM Lens Telephoto zoom lens - 70-300mm focal length, fast f/4-5.6 aperture Image Stabilizer gives equivalent effect of a shutter speed three stops faster during hand-held shooting UD lens elements to effectively correct aberration for high quality throughout the zoom range Closest focus distance of just 1.5m at all zoom focal lengths Zoom ring locking mechanism that locks the lens at its shortest total length