Focal Length : 85mm
Maximum Aperture : 1.8
Minimum aperture : 22
Lens Construction : 9 elements in 7 groups
Diagonal Angle of View : 28o 30'
Focus Adjustment : Rear focusing system with USM
Closest Focusing Distance : 0.85m / 2.8 ft
Filter Size : 58mm
Dimensions (D x L) : 75.0 x 71.5mm (3.0" x 2.8")
Weight : 425g (15.0 oz)