Traduction de Manuel M

Canon IVSB2 was produced  July 1954 to July 1956.
Produced specimens: 16,800
It is also called IVS3

Compared to the IVSB:

First Canon model to have a synchro X rapid. In fact, there are two positions “X” on this model. A new position X “rapid” with 1/45 S, located on the serrated roller fast speeds on the HOOD, between the speed of accession at the slow speeds 1/30-1 and 1/60 S. second position X is located on the serrated roller slow speeds, between the 1/15 S and the 1/30 S is, in fact, a slow speed, related with a synchro M (or F). In 1954, most photographers had a magnesic flash with lamp, incompatible with a speed fast synchro.

replacement of the 1/25s by the 1/30s, for an arithmetic progression speeds.
new serrated roller fast speeds, with central index indicating selected speed.
new viewfinder and magnifying glass of focusing.

Principal characteristics:
    
Serial numbers: 122490 to 229000
Interchangeable lenses with the Leica standard screwing of 39mm and coupled with the rangefinder.
Rangefinder viewfinder combined for 50mm. No frame nor of correction of parallax. Round telemetric Image.
Magnifying glass of focusing of the rangefinder with 3 positions: F - 1x and 1.5x, actuated by a lever made up of only one part.
Magnifying glass of focusing of the IVS, allowing fast speeds, of the 1/30s to the 1/1000s + B + X to the 1/45 S, by new serrated roller on the hood, with index. Slow speeds, of the 1s to the 1/30s + T and X (between the 1/15 S and the 1/30 S), by separated serrated roller, located on the front face of the body. The serrated roller slow speeds has a lock in its position inactivates > 1/25 S.
35mm for exposures 24x36mm
Socket of flash synchronization on side rail, for flash “X and M.-bulb”.
Loading by the sole.
The button of cocking has a window of recall of the type of film used
Standard lens: Canon 50 mm F1.8 - Canon Serenar 50mm f1.5 or f3.5.
A fast cocking, by trigger in the sole of the camera, can be mounted.


Picture one: IVSB2 - n°: 189866 with Canon - f1,8-16 of 50mm and Canon adapter “universal flash” fixed on the rail synchronization.

Picture two: Detail of the new serrated roller with index

Picture three: Detail of the adapter Canon synchronization