Focal Length: 35mm.
Maximum Aperture: f/1.4.
Lens Construction: 14 elements in 11 groups.
Diagonal Angle of View: 63*.
Focus Adjustment: AF with full-time manual;Max. 
Diameter x Length, Weight: 3.2 x 4.2 in., approx. 26.8 oz. / 80.4 x 105.5mm, approx. 760g.
Closest Focusing Distance: 0.92 ft./0.28m;Filter Size: 2.8 in./72mm diameter.