FL-YFL5028A-035 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) 102∼72 mm 125∼88 mm 146∼102 mm 201∼146 mm 37.16∼43.29 mm 52 P=0.75 mm 0.28 ∼ 0.4X 435 g Focus & Iris lock screws. Not for photographic cameras.