Lens Mount: Canon EF
Focal Length: 24mm
Maximum Aperture: 1.4
Lens Construction: 13 elements in 10 groups
Diagonal Angle of View: 84°
Focus Adjustment: Rear focusing system with USM
Closest Focusing Distance: 3.0 in./77mm
Filter Size: 77mm
Max. Diameter x Length, Weight: 3.4 in./86.9mm; 22.9 oz./650g