Focus: Manual Iris: Manual Focal Length (mm): 25 Iris Range: F1.4 ~ F22 Back Focal Distance (in air) (mm): 22.32 Exit Pupil Position (From Image Plane) (mm): -140 Filter Thread (mm): M49 x 0.75 Mass (g): 310 Focusing Range (From Front Of The Lens) (m): ‡ ~ 0.1 Angle Of View: 28‹43' x 21‹44' Object Dimensions at M.O.D.: 65 x 48