A unique and indispensable addition to Canon's series of EF lenses, the new Canon 40mm f/2.8 STM EF lens offers an ultra-slim and lightweight design. Incredibly compact in size, the EF 40mm f/2.8 STM delivers high image quality from the center to the periphery thanks to its advanced lens configuration including an aspherical element, a bright 2.8 aperture, and optimized coatings that minimize ghosting and flare while providing exceptional color balance. The EF 40mm f/2.8 STM's unobtrusive design helps the photographer avoid overwhelming their subjects with a large lens and to remain discreet in sensitive shooting situations with no compromise in performance. Its diminutive design is complemented by features such as a newly developed stepping motor for smooth and quiet continuous AF while capturing video with the Canon EOS Rebel T4i/T5i or 70D series DSLRs, a circular aperture (7 blades) for beautiful soft-focus backgrounds, and a short minimum focusing distance of only 0.98 ft./0.30m.
Learn about the STM technology in this video by Canon:
|Focal Length & Maximum Aperture||40mm, 1:2.8|
|Lens Construction||6 elements in 4 groups|
|Diagonal Angle of View||57°30'|
|Focus Adjustment||Inner Focusing System|
|Closest Focusing Distance||0.98 ft./0.3m|
|Max. Diameter x Length, Weight||2.7 x 0.9 inch, 4.6 oz. / 68.2 x 22.8mm, 130g|