Canon EF-S 24mm f/2.8 STM Lens Wide-angle lens for Canon APS-C cameras (equivalent to 38mm on a full-frame camera) Focal Length & Maximum Aperture: 24mm 1:2.8, maximum magnification of x0.27 Slimmest and lightest lens of the EF-S series Circular aperture (7 blades) delivers beautiful, soft backgrounds Full-time manual focus allows manual focus adjustment while in One Shot AF mode Minimum focusing distance of 0.16 m/0.5 ft.