Voigtländer Bessa Zweiformat Pressure Plate (01)

            Voigtländer Bessa Zweiformat
German folder, c 1937

The German word "Zweiformat" means "Dual Format".
By using an inlay mask the film frame size could be reduced from 6x9 to 4.5x6 cm.

Peculiar about this Bessa is the fact that its 4.5x6 Inlay Mask automaticly "enables" the opening of the second red window. The Mask engages a pawl which turns a blade away (against a spring) from the 4.5x6 window.

Here the Pressure Plate shown in its default state (6x9). 
The Open/Close Knob (here shown in the Open position) is attached to a blade which runs over both windows.
The 6x9 window is open and the 4.5x6 window would have been open too if not by the fact that the blade attached to the pawl still covers it.

You may ask yourself, why are the 2 red windows at the same height ?
Well, at that time, 1937, still most films had no numbers for 16 frames (4.5x6) printed on their paper backing (only 8 and 12 frames). So you needed 2 windows to transport the 8 frame (6x9) numbering half its length.   
   

Taken on: February 1, 2015

Tags:

Voigtländer

Bessa

Dual

Format

Inlay

Mask

Knob

Open

Red

Window

Any White Field Tag by Flickrs SpamTagBot « less

Sets appears in: • Voigtländer Bessa Zweiformat folder Notes

Groups appears in: • Folding medium format cameras • Classic Voigtländer more » • Camera-wiki.org « less

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