Specifications : Type: Glass Focal length(mm): f3.8 F-stop: F2.0 Angle of view (D x H x V): 1/2\” : – 1/3\” : 90.0° x 71.5° x 53.4° 1/4\” : 67.0° x 53.4° x 40.0° M12 P=0.5
