A dictionary of photography for the amateur and professional photographer (1889)
Wall, E. J. (Edward John), 1860-1928 · New York : E. & H.T. Anthony · leaf 222
ance, for quarter-plates, or 4^ by 3^, the opening may be |J in. by if ; or for half-plate, }£ by il- This opening frames A 8 P M H the view, and limits its extent according to the distance the inner tube is drawn out. efil is the other brass tube sliding inside ab CD, having at one end a double… … To use this it must be adjusted to the lenses with which it will be worked. To do this it is only necessary to erect the camera, focus carefully, and, marking two prominent objects on the edges of the screen, adjust the small view-meter till the same objects are exactly on the edges of the field of…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
