Olympus FTL :
1971: Olympus FTL
Manufactured by Olympus Co. in 1971, with Fixed pentaprism , Shutter: 1-1/1000,B , Flash: F, X, and hot shoe; 1/60. , Metering: full aperture TTL metering , Finder: Microprism spot and ground-glass collar; meter needle , Battery: PX625 . Auto diaphragm , Instant return mirror , Self-timer , It has a ball catch at the point where lens is fully screwed home, providing the lens catch . (Fujica and Mamiya cameras have similar feature in the same time).