BROCHURE FEATURE MODEL OT-0620 0T-0820 Lens Construction 6 components, 6 elements Focal Length 6mm 8mm Maximun Relative Aperture F / 2.0 Iris without diaphragm Mount Type C Weight 30 g Application for 1/2 " & 1/3" CCD CAMERA FEATURE MODEL OT-0420 OT-0816 Lens Construction 6 components, 6 elements Focal Length F / 2.0 F / 1.6 Iris without diaphragm Mount Type C Weight 30 g 60 g Application for 1/2" & 1/3" CCD CAMERA