100 mm focal length and 1:2.8 maximum aperture. The EF1.4X II/EF2X II extenders cannot be used with this lens. There are no compatible close-up lenses.
Lens construction consists of 15 elements in 12 groups.
23.4-Degree diagonal angle of view
Inner focusing system with USM and full-time manual focus option.Closest focusing distance 0.99 ft./0.3m (maximum close-up magnification: 1x)
67 mm filter size
100mm lens with f2.8 aperture
Canon’s first mid-telephoto macro “L” series lens to include Canon’s sophisticated Image Stabilization
Near-silent Ultrasonic focusing
Enjoy life-size close-up capabilities without an adapter
Compatible with 67mm filters