Focus: Manual Iris: Manual Focal Length (mm): 35 Iris Range: F1.4 ~ F22 Back Focal Distance (in air) (mm): 14.99 Exit Pupil Position (From Image Plane) (mm): -37 Filter Thread (mm): M49 x 0.75 Mass (g): 185 Focusing Range (From Front Of The Lens) (m): ‡ ~ 0.2 Angle Of View: 14‹20' x 10‹46' Object Dimensions at M.O.D.: 50 x 38