Screw Mount Leica Table
Leica III A Screw Mont Leica is normally cald "Barnack leica" in Japan, as Osker Barnack(1879-1936) of Leitz designed the early model of Leica cameras.
Leica C.A. Interchange
RF Ilet Slow
Synch Remarks 1 A 1925 No No No No 500 No Made debut at Leipzig in 1925 2 B 1926 No No No Yes 300 No With Compur Shutter 3 C 1930 Yes* No No No 500 No Lens interchangeable but dignated lens only 4 II 1932 Yes Yes No No 500 No First RF model 5 III 1933 Yes Yes Yes Yes 500 No First Slow shutter model 6 IIIa 1935 Yes Yes Yes Yes 1000 No First with 1/1000sec model 7 IIIb 1938 Yes Yes Yes Yes 1000 No First small eye peace interval 8 IIIc 1940 Yes Yes Yes Yes 1000 No Die-cast body, pre War model 9 IIIc 1945 Yes Yes Yes Yes 1000 No Post War model 10 IIc 1948 Yes Yes Yes No 1000 No No slow shutter 11 Ic 1949 Yes No Yes No 1000 No No RF model 12 IIIf 1945 Yes Yes Yes Yes 1000 Yes Synchro(Black) 13 IIIf 1950 Yes Yes Yes Yes 1000 Yes Synchro(Red) 14 IIIf 1954 Yes Yes Yes Yes 1000 Yes Self-Timer 15 IIf 1951 Yes Yes Yes No 1000 Yes No Slow shutter 16 If 1952 Yes No Yes No 1000 Yes No RF model
Features of Screw Mout Leica
1 Film loading Its hardly possible to load the current films. Need to extent the leader tip of film from current 4cm to 11cm. 2 Eye peace There are two eye peaces for view and range finder. The interval between them is 6mm after the IIIb, 20mm for before IIIa. 3 Synchronous From IIIf models. can synchronous under 1/30sec at the black dial number "2" for electric strobe, 1/50sec at red number "20" for later models. 4 Body Metal Plate body was used IIIb or before, die-cast body was used IIIc or later models which made about 2mm bigger in size of width and height. 5 Shutter No slow speeds for II or before models. Highest shutter speed was 1/500sec for II and III, made 1/1000sec for IIIa or later models. No slow speed was added for IIc,Ic,IIf,If models. 6 Eyelet No eyelet for II or before. 7 Self-Timer It had only the latest model of IIIf.
The data refered to "Leica Manual"(by K.Urago: Nippon Camera Inc.).