Despite the large maximum aperture, the lens remains compact. Lens group 5 moves for rear focusing, and sharp, crisp pictures are obtained at all apertures. The background blur is ideal for portraits. The USM autofocuses the lens quickly and quietly.

• Weight (g) : 460
• Filter Diameter (mm) : 58
• Maximum Magnification (x) : 0.14
• Magnification with Extension Tube : EF12 0.27-0.13
• Magnification with Extension Tube : EF25 0.42-0.28
• Diagonal Angle of View : 24??
• Horizontal angle of view : 20??
• Lens Construction (elements/groups) : 8/6
• Max. Diameter x Length (mm) : 75x73.5
• Minimum Aperture : 22
• No. of Diaphragm blades : 8
• Closest Focusing Distance (m) : 0.9
• AF Actuator : USM (Mechanical full-time manual focusing built-in.)