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Deutsch: Nachbau einer Rechenmaschine von 1700 von de:Gottfried Wilhelm Leibniz
English: The Staffelwalze, or Stepped Reckoner, a digital calculating machine invented by Gottfried Wilhelm Leibniz around 1672 and built around 1700, on display in the Technische Sammlungen museum in Dresden, Germany. It was the first known calculator that could perform all four arithmetic operations; addition, subtraction, multiplication and division. 67 cm (26 inches) long. The cover plate of the rear section is off to show the wheels of the 16 digit accumulator. Only two machines were made. The single surviving prototype is in the National Library of Lower Saxony (Niedersächsische Landesbibliothek) in Hannover; this is a contemporary replica.
|Source||recorded by me in de:Technische Sammlungen der Stadt Dresden (with photo permission)|
( Reusing this file)
|Exposure time||1/40 sec (0.025)|
|ISO speed rating||160|
|Date and time of data generation||15:12, 5 July 2006|
|Lens focal length||6.3 mm|
|Horizontal resolution||72 dpi|
|Vertical resolution||72 dpi|
|File change date and time||15:12, 5 July 2006|
|Y and C positioning||Co-sited|
|Exposure Program||Normal program|
|Date and time of digitizing||15:12, 5 July 2006|
|Image compression mode||4|
|Maximum land aperture||3.875 APEX (f/3.83)|
|Flash||Flash fired, strobe return light not detected, auto mode|
|Custom image processing||Normal process|
|Exposure mode||Auto exposure|
|White balance||Auto white balance|
|Scene capture type||Standard|
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