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| Praktica FX 2/3 derivatesProduction period: August 1955 to June 1959 Number of Models: 7 Number of produced items: 136,408 responsible constructor: Siegfried Böhm
The FX 2/3 derivates demonstrates a new coverage type of the waist-level view finder as well as the establishment of the internal aperture release for lenses with automatic diaphragm operation or manually tensioned automatic diaphragm. The basic model were denoted as "Praktica". In the manuals the camera were designated as "Modell III" or "FX 2". Because of a declination of this name the first variation receive the name "Praktica FX 2". The FX 2 were presented at the Leipzig'er Spring Fair in 1956. At this time the production for the company Porst, from Nürnberg, started with under the designation "Porst reflex FX2". The further development of the FX 2/3-line leads to the internal aperture release for lenses with automatic diaphragm operation or manually tensioned automatic diaphragm. Also the F-contact were reintegrated as a second coaxial flash socket in this model which were presented at the Leipzig'er Autumn Fair in 1956 (FX2, 1st variation). For export of this models the cameras were renamed to "Praktica FX3". In 1958 the last modification of this camera line were induced by a modification of the Flashbulbs which were released by the F-synchronisation. Hitherto this time were adjusted to 10 milliseconds before start of exposure. Hence this point were relocated to 10 milliseconds before complete shutter release. All cameras with this modification were designated as "Praktica F.X 2", and rare as "Praktica FX 2.". For export version of the camera the were named analogous as "Praktica F.X 3.
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