Small and lightweight, the Canon USM EF 20 mm lens has been designed for Canon cameras that are used by photographic professionals to shoot wide-angle photographs and panoramic images. You can adjust the focal length of this Canon lens using the auto or manual mode. Having a focal length of 20 mm, the Canon USM EF clicks clear panoramic images of distant objects. The 94-degree wide-angle coverage of this Canon lens allows you to capture large format photos. With an aperture range of f/2.8-22, this 20 mm lens allows you to shoot sharp and vibrant outdoor photos. The Canon USM EF accepts a 72 mm filter to reduce glare and improve saturation.