... idt ISO14001:2004,GB/T19001-2008 idt ISO9001:2008 2.Quality control:Our products are guaranteed by the ... image,all-metal lens2.Fixed focal length 50mm,2/3 inch,C-mount,F1.4 aperture manual ... 100% wel-environment glass.Specification: Model NumberABF-F5014MV-Y 2/3"Focal Length(mm)50mm Aperture(F)1.4Format ... 35mm,50mm)ABF fixed focus auto iris lens series: (2.8mm,4mm,6mm,8mm,12mm,16mm) Certificate: High ...