The Elmo 9813, also called QT288, is an ultra-micro-mount lens for the specialty 1/4-inch CCD pencil-sized cameras, namely the QN42H. The lens has a 7mm screw mount unique at Elmo for these amazingly slim industrial cameras. As an 8.0mm, the lens shows a 25° horizontal angle of view. Its f/2.8 maximum aperture allows the lens to capture images in semi-low light conditions.