Optimized for close-up shooting, the EF 100mm f/2.8 Macro USM from Canon mixes a comfortable short telephoto focal length with a short working distance. As a macro lens, first and foremost, this lens espandi...affords a life-size, 1:1 maximum magnification along with a 1' minimum focusing distance and the 100mm focal length is also well-suited for portraiture and other mid-length subjects.