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LMVZ9020-IR Model Focal Length (mm) Zoom Ratio Image Size (mm) Iris Range (F-Stop) Iris Control Focus Control Minimum Focus Distance (m) Back Focal Length (mm) Flange Focal Length (mm) Angle of Dia. View in Degrees Hor. Ver. Field of View Dia. at M.O.D. (mm) Hor. Ver. Clear Aperture (mm) Front Rear Lens Construction Distortion (TV) Exit Pupil Position (mm) Mount Weight (g) LMVZ9020-IR 9~20 2.2x 1/2" (Ø8) F1.6~F22 Manual Manual 0.5 W 8.4/T 14.8 12.5 W 55.0/T 23.4 W 42.3/T 18.7 W 30.9/T 13.9 W 554/ T 220 W 411/ T 175 W 293/ T 130 Ø19.2 Ø8.4 8 Groups 9 Elements W -5.2%/T -0.8% W -173.5/T -48.2 CS-Mount 95