Focus: ManualIris: ManualFocal Length (mm): 50Iris Range: F2.3 ~ F22Back Focal Distance (in air) (mm): 15.26Exit Pupil Position (From Image Plane) (mm): -25.1Filter Thread (mm): M25.5 x 0.5Mass (g): 45Focusing Range (From Front Of The Lens) (m): ‡ ~ 0.5Angle Of View: 10‹03' x 7‹33'Object Dimensions at M.O.D.: 77 x 57