Difference between revisions of "Ibso"
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| − | The '''Ibso''' shutter with a 3 blade diaphragm was made by [[Gauthier]] from 1908-1926. It was the first [[everset shutter]] (i.e. an 'automatic' shutter, not needing to be cocked) on the market.<ref>[http://www.prontor.de/go/unternehmen-firmengeschichte/english.html Gauthier (now Prontor) company history] at [http://www.prontor.de/go/home/english.html Prontor GMBH].</ref> The cylinder at the top of the shutter is a pneumatic air-brake which regulates the speed. | + | The '''Ibso''' shutter with a 3 blade diaphragm was made by [[Gauthier]] from 1908-1926. It was the first [[everset shutter]] (i.e. an 'automatic' shutter, not needing to be cocked) on the market.<ref>[http://www.prontor.de/go/unternehmen-firmengeschichte/english.html Gauthier (now Prontor) company history] at [http://www.prontor.de/go/home/english.html Prontor GMBH].</ref> The cylinder at the top of the shutter is a pneumatic air-brake which regulates the speed. The shutter is found on many folding cameras of the period and has the usual limitation of everset shutters that it cannot offer very fast speeds; the original Ibso shutter gives seven speeds from 1 to 1/100 second, plus 'B' and 'T' and was provided with a cable release socket. There are also Ibso shutter variants that offer an extra speed of 1/150 sec. |
Gauthier replaced the Ibso shutter with the [[Ibsor]]. | Gauthier replaced the Ibso shutter with the [[Ibsor]]. | ||
Revision as of 21:02, 7 June 2016
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The Ibso shutter with a 3 blade diaphragm was made by Gauthier from 1908-1926. It was the first everset shutter (i.e. an 'automatic' shutter, not needing to be cocked) on the market.[1] The cylinder at the top of the shutter is a pneumatic air-brake which regulates the speed. The shutter is found on many folding cameras of the period and has the usual limitation of everset shutters that it cannot offer very fast speeds; the original Ibso shutter gives seven speeds from 1 to 1/100 second, plus 'B' and 'T' and was provided with a cable release socket. There are also Ibso shutter variants that offer an extra speed of 1/150 sec.
Gauthier replaced the Ibso shutter with the Ibsor.
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