FeaturesModerate wide-angle lens; equivalent to 35mm on a full-frame camera.Ultra-slim and lightweight design.One aspheric lens element delivers superb image quality.Bright f/2.0 lens - combined with the large sensor of an EOS M series digital camera - delivers exceptional low-light performance and beautiful background blur.Built-in stepping motor provides smooth and quiet continuous autofocus when shooting video with Canon EOS M series digital cameras. Circular aperture (7 blades) delivers beautiful, soft backgrounds.Minimum focusing distance of 5.9 in./0.15m allows you to get close to your subjects.