This vintage lens from Bausch Lomb is a unique addition to any camera collection. With a screw mount and a fixed/prime focal length of f/1.8, this symmetrical 4x5 wide-angle lens produces stunning images. Its exterior is made of brass, giving it a classic and durable look. This lens is compatible with universal brands and features a Unicum shutter type. It comes with a 30-day seller guarantee and is a unit quantity item. The lens has a patent that dates back to January 6, 1891, and was manufactured in the United States. Please note that this item is subject to California Prop 65 warning, please visit www.p65warnings.ca.gov for more information.