Lens Mount: Canon EF
Focal Length: 100mm
Maximum Aperture: 2.8
Lens Construction: 15 elements in 12 groups
Diagonal Angle of View: 23.4°
Focus Adjustment: Inner focusing system with USM. Full-time manual focus available
Closest Focusing Distance: 0.99 ft./0.3m (maximum close-up magnification: 1x)
Filter Size: 67mm
Max. Diameter x Length, Weight: 3.1 x 4.8 in./77.7 x 123mm, 22.0 oz./625g