This telephoto lens offers a high level of performance demanded by users interested in wildlife photography and other long-range settings. With a maximum aperture of f/4 and a quick and quiet autofocusing ring, this Canon lens allows the user to take exceptional photos without disturbing the subject being photographed. A circular polarizing filter can be added to the camera lens with ease and precision, because the front lens element does not rotate during focusing. Lightweight and compact, the Canon lens is easy to transport on nature hikes and other on-location shoots. This camera lens is more advanced than its predecessor, offering a focal length of 70 mm - 150 mm. In all, this Canon lens is a great telephoto lens for novice and amateur photographers, with its easy-to-use manual focus feature. This lens is a mid-range tool and a good accessory for a Canon camera.