Specifications : Focal Length & Maximum Aperture 100mm 1:2.8 Lens Construction 12 elements in 8 groups Diagonal Angle of View 24° Focus Adjustment Inner focusing system with USM Closest Focusing Distance 0.31m / 1 ft. (film plane to subject) Filter Size 58mm Max. Diameter x Length, Weight 3.1" x 4.7", 21.1 oz. / 79.0 x 119.0mm, 600g Back to Top