Just testing my delighful Ricoh TLS 401. The Copal vertical focal plane shutter with metalic curtains works well timed in every speed. Just the lightmeter is not working. A great camera from the early 70's. The special thing of this camera is that you can also turn a dial on the side of the pentaprism cover and, by opening a small window above you can focusing from this viewer above. It is too small to work as a waist viewer, but it is helpful in many situations. Also nice to steal some pic. M-42 thread mount.