The Canon EF 70-200mm f/2.8L IS II USM Lens delivers impressive image quality, focuses accurately very fast and has top-of-the-line build quality, 4-stop Image Stabilization, weather sealing and a very useful focal length range. This is now my favorite and one of my most-used lenses.
A highly practical medium telephoto lens with superb delineation and portability. Images are sharp and clear at all apertures. Through computer simulations, the lens has been designed to give beautiful background blur.
Despite the appearance of a rather basic lens with a very affordable price tag, the Canon 10-18mm lens is an extremely sharp lens -- even wide-open and at its widest focal length. At 10mm, the lens displays very sharp centers with only a hint of corner softness.