Format: Full-frame format digital sensors. The focal length is equivalent to 21mm on an APS-C format sensor (with a 1.5x focal length magnification factor). Equivalent to 28mm on a Micro Four Thirds format sensor.
Angle-of-View: 115.7 degrees (diagonal on 35mm).
Construction: 14 elements/10 groups. Minimum Focus: 28cm.
Maximum Reproduction Ratio: 1:12.5 Aperture Range: f/2.8 to f/22.
Overall Length: 96.1mm (Canon EF mount). Maximum Diameter: 87.0mm.
Filter Diameter: No screwthread filter fitting. Gel filter holder at rear.
Weight: 649g (Canon EF mount).
Lens Mount(s): Canon EF, Canon EF-M, Fujifilm X, Nikon F, Sony and Micro Four Thirds.
Features: Focus ring lock, switchable click-stopped/stepless aperture collar, manual focus, metal barrel tubes, weather-sealed external construction, one H-ASP hybrid aspherical element, one ASP aspherical element, two extra-low dispersion glass elements, three high-refractive index glass…