Leicaflex Leitz :

1939: Leicaflex

Manufactured by Leitz in 1964, The Leicaflex had no TTL metering (through the lens), but rather a separate meter with a small window on the mirror housing. This first SLR Leica, however, already had the bright viewfinder image that is typical of Leicas; furthermore, it even offered mirror lock-up - a detail that was missing in many later Leica SLRs. Leicaflex lenses had one cam.