... ,clear image 2.Focal length 4.0mm,1/2 inch,M12*0.5 mount,F1.8 aperture 3.5mega IR lens Hot selling 4.0mm 5 megapixel ... ,clear image,all-metal lens2.Focal length 4.0mm,1/2 inch,M12*0.5 mount,F1.8 aperture 5 megapixel board lens3.Popular ... : Model Number ABF-IR0418B5MP Focal Length(mm) 4.0mm Aperture(F) 1.8 Format(inch) 1/2 Mount M12*0.5 Angle of View ...