Difference between revisions of "Argus A2B"

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| image_text=rgus A2B's exposure calculator, image by Kathy Hunt Photo {{with permission}}
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| image_text=Argus A2B's exposure calculator, image by Kathy Hunt Photo {{with permission}}
 
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| image_text=image by Kathy Hunt Photo {{with permission}}
 
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Like the [[Argus A]] but had a built-in extinction meter and exposure calculator. Produced from 1939 thru 1950 originally costing $12.50.
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Like the [[Argus A]] but had a built-in extinction meter and exposure calculator. Produced from 1939 thru 1950 originally costing $12.50. [[Argus]] of Ann Arbor, Michigan, held two U.S. patents on it, one on the pop-out lens tube with a simple bayonet locking mechanism, invented by C.A. Verschoor, and one on the [[extinction meter]] with exposure calculator, invented by W.F. Carr.
  
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The Camera had a 50mm f/4.5 coated [[Anastigmat]] made in [[USA]], mounted in a shutter/aperture assembly with nine-blade [[diaphragm]] for apertures f4.5 to f18 and a [[everset]] shutter with T an B mode plus the speeds 1/25, 1/50, 1/100 and 1/150 sec.. Other sources report A2B cameras with [[Ilex]] shutter (1/200 sec. max speed), maybe the prewar variant. An exposure counting wheel in the camera's top is driven by the perforation of the [[35mm film]]. On top are also the film advance wheel, the reverse Galilean [[viewfinder]], and the meter. The meter has a broad window in the backthrough which more or less of the extinction meter's more or less translucent foil pieces become visible, depending on the light situation. The exposure calculator's big shifter on top of the meter must be shifted as far right as light is visible through the window. Then the lower end of the little shifter must be shifted so that it points onto the word for the light situation (bright, average, cloudy, or internal light). Then the possible apprpriate shutter-speed/aperture combinations can be read from the little shifter and the speed-table column beside it.
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== Links ==
 
== Links ==
 
* [http://arguscg.tripod.com Argus Collectors Group]
 
* [http://arguscg.tripod.com Argus Collectors Group]

Revision as of 18:37, 6 February 2010


Like the Argus A but had a built-in extinction meter and exposure calculator. Produced from 1939 thru 1950 originally costing $12.50. Argus of Ann Arbor, Michigan, held two U.S. patents on it, one on the pop-out lens tube with a simple bayonet locking mechanism, invented by C.A. Verschoor, and one on the extinction meter with exposure calculator, invented by W.F. Carr.

The Camera had a 50mm f/4.5 coated Anastigmat made in USA, mounted in a shutter/aperture assembly with nine-blade diaphragm for apertures f4.5 to f18 and a everset shutter with T an B mode plus the speeds 1/25, 1/50, 1/100 and 1/150 sec.. Other sources report A2B cameras with Ilex shutter (1/200 sec. max speed), maybe the prewar variant. An exposure counting wheel in the camera's top is driven by the perforation of the 35mm film. On top are also the film advance wheel, the reverse Galilean viewfinder, and the meter. The meter has a broad window in the backthrough which more or less of the extinction meter's more or less translucent foil pieces become visible, depending on the light situation. The exposure calculator's big shifter on top of the meter must be shifted as far right as light is visible through the window. Then the lower end of the little shifter must be shifted so that it points onto the word for the light situation (bright, average, cloudy, or internal light). Then the possible apprpriate shutter-speed/aperture combinations can be read from the little shifter and the speed-table column beside it.

Links