Focal length: 100 mm
Maximum aperture: 2
Minimum Aperture: 22
Lens construction: 8 elements in 6 groups
Diagonal angle of view: 24o
Focus adjustment: Rear focusing system with USM
Closest focusing distance: 0.9m / 3ft
Filter size: 58mm
Dimensions (D x L) :73mm x 73.5mm (2.9" x 2.9")
Weight: 460g (1.0 lbs)