Focus: Manual Iris: Manual Focal Length (mm): 16 Iris Range: F1.4 ~ F22 Back Focal Distance (in air) (mm): 17.99 Exit Pupil Position (From Image Plane) (mm): -172 Filter Thread (mm): M49 x 0.75 Mass (g): 285 Focusing Range (From Front Of The Lens) (m): ‡ ~ 0.1 Angle Of View: 30‹45' x 23‹18 Object Dimensions at M.O.D.: 69 x 51