M8513 2/3" 8.5mm w/iris & focus Lens. Monofocal lenses are an economical choice providing fixed focal lengths from super wide angle to telephoto depending on the camera format and intended application. Dedicated design emphasis on the performance for close-up applications required in factory automation and image processing areas. Captures full resolution of megapixel cameras. Low distortion. Assured excellent light intensity even in peripheral areas. High contrast and sharp picture in all areas of the screen. Compact design. Locking set screws for focus and iris. Its Focal Length: 8.5mm - 75mm and Max. Aperture Ratio: 1:1.2 with Max. Image Format: 8.8mm x 6.6mm. This products Back Focal Length: 16mm and Flange Back Length: 17.526mm with 8.3mega pixel Filter Size. Its Dimensions: 59.9mm x 114.5mm and Weight is 475g. Comprehensive 3-year warranty. CBC AMERICAS Corp. is part of a multi-billion dollar global network of Import Export, Trading and Distribution companies strategically located throughout the world with headquarters in Tokyo, Japan. Their main areas of business are importation and distribution of, CCTV Security Products, Chemicals and Pharmaceuticals and Commercial Flooring.