The Marshall V-4303.5-1.9 is one of the 4300 series of custom mount glass lenses designed for industrial applications. It comes with the 12 mm micro mount thread which can fit the board cameras and some of the Marshall bullet cameras. This is a high quality lens that incorporates 5 glass elements. It has a fast f/1.9 aperture for less than brightly lit areas. In addition the lens offers a medium-wide 65° horizontal angle of view and a MOD of about 16 inches.