The Canon EF 40mm f/2.8 STM delivers performance through an incredibly compact and unobtrusive design for EOS DSLR cameras, ideal for discreet shooting or to avoid intimidating portrait subjects with larger lenses. The EF 40mm f/2.8 STM delivers high image quality from center to edge, with an  advanced lens configuration featuring an aspherical element, a bright 2.8 aperture, and optimized coatings that minimize ghosting and flare while providing exceptional color balance.The ultra-slim, lightweight design is complemented by features such as a stepping motor for smooth and quiet continuous AF when capturing video with the EOS Rebel T4i, a seven blade circular aperture for beautiful soft-focus backgrounds, and a short minimum focusing distance of only 0.98 ft./0.30 m. The EF 40mm f/2.8 STM can be easily switched between Manual and AF, depending on the subject and shooting situation.