This is for a Schneider Kreuznach Symmar-S 150mm f5.6 lens for large format cameras. The lens is in Excellent condition. The glass is clean, clear, and unmarked. There is some light Schneideritis in the front, no effect. The aperture blades open/close fine. The shutter trips reliably and the speeds progress as they should. The 1 and ½ second match perfectly with my DSLR. The Bulb and Time work. The shutter is a Copal No. 0. It comes with a generic 58mm front cap.