The first drum scanners were developed by Hell since 1966. These scanners were not linked to a computer, since pictures could not yet be stored digitally. Available memory devices had not enough memory capacity, and they were too expensive and too slow. Only beginning in 1978, the first drum scanners could digitize pictures and store them in a computer.

Principles of analog scanner     
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    Gradation und Farbkorrektur

    Theoretischer Leitfaden

    German (8,7 Mbyte)


  Chromagraph Gradation und Farbkorrektur 1974 04 

Chromagraph DC 300 B (1975)

  Chromagraph DC 300 
Chromagraph C 299   (1977)
Chromagraph CP 340 (1978)
Chromagraph DC 350 (1978)
  Chromagraph C299
ChromaGraph DC 3000
   S 3010
  Tango / Primescan (1997)   Tango
  Topaz (1994)   Topaz
  Nexscan 4200 (2000)   Nexscan