The M1 Matte Box shields your camera from sunlight to prevent lens flare. The degree of shielding can be freely selected by adjusting the three movable barndoors individually. The M1 is compatible with all DSLR rigs with 15mm rods at a distance of 60mm, and fits lenses from 43 to 82mm in diameter. The height of the matte box can be adjusted to match the lens of your camera when mounted on the rod system.