The Canon 70-300mm f/4.5-5.6 DO IS USM lens is an ultra compact telephoto zoom lens that offers superior performance and incorporates DOIS (Image Stabilizing) technology. (Diffractive Optics) and
Use of Diffraction Optics allows lenses to be designed so that they are shorter, lighter, and of a higher image quality than a comparable refractive optical system of the same focal length and aperture (it should be noted that while this lens is heavier than Canon's 70-300 IS lens, it is 30% shorter and has Canon's very best ring-USM motor where the 70-300 IS uses a lighter, slower, and less costly 'micro-USM' motor).
The lens' AF is super-fast and silent with a ring-type USM, focuses down to 4.6 feet, and features a zoom lock button that keeps the lens safe and secure when not in use or used at the wide angle setting. This is an ideal lens for sports, portraiture, animals etc. whenever you're shooting in relatively bright light.
