Focal Length & Maximum Aperture of 100mm 1:2.8
Lens Construction is made up of 15 elements in 12 groups.
Diagonal Angle of View of 23.4�
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 of 67mm.
Max. Diameter x Length, Weight of 3.1 x 4.8 in./77.7 x 123mm, 22.0 oz./625g.