This brass Wray London lens is designed to cover 4×5, despite its tiny size: it’s less than 4cm long. It’s a 5.5″ lens (about 140mm) and has an almost perfectly circular diaphragm with apertures down to f64. Barrel has some tarnishing and surface wear, aperture control is a bit tight towards the smaller apertures, but the optics are quite clean. Includes a threaded mounting flange.