FL-YFL5028A-02 Product specifications Format size Focal length Maximum aperture ratio Iris range Mount Field of view Working distance Back focal length Filter size Dimensions Min.~Max. Magnification Weight Remarks 45 mm Image circle 50 mm 1：2.8 2.8∼22 F-mount (bayonet mount) 191∼125 mm 234∼152 mm 273∼178 mm 361∼242 mm 30.43∼34.54 mm 52 P=0.75 mm 0.15 ∼ 0.23X 425 g Focus & Iris lock screws. Not for photographic cameras.