15 elements in 13 groups
Angle of View: 75°-24°
Diaphragm Blade Number: 9
Minimum Aperture: F/22
Minimum Focus: 19.7in.(0.5m)/28-105mm, 17.3in(.044m)/70-85mm
Macro Mag. Ratio 1:4.7
Filter Diameter: ø82
Weight: 31.4oz. (880gm)
Diameter x Length: ø3.4 x 4.4in. (ø87 x 112mm)
Mount: Canon, Minolta, Nikon