Artificial intelligent assistant

iconometer

iconometer Photogr.
  (aɪkəˈnɒmɪtə(r))
  [f. icono- + -meter.]
  (See quots.)

1894 E. L. Wilson Cycl. Photogr. 194/1 Iconometer, view-meter; a pocket instrument which quickly indicates what kind of objective to use..from a given standpoint, or..the standpoint suitable for a view with a given objective. 1918 Photo-Miniature Mar. 25 Iconometer, a view-meter of ‘direct-vision’ pattern, i.e., consisting of an open frame with an eyehole or lens fixed behind it. 1919 Brit. Jrnl. Photogr. Alm. 244 A view-meter, or iconometer, is a separate accessory for ascertaining the picture produced by any given lens and size of plate.

Oxford English Dictionary

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