An introduction to the science & practice of photography (1895)
Jones, Henry Chapman, 1854- · London, Iliffe, Sons & Sturmey Ltd · leaf 134
ruction was soon abandoned. The greatest departure from the rules ordinarily observed by opticians in devising photographic lenses has been made by H. A. Steinheil in his " antiplanatic " lenses for por- traiture and views which were introduced in 1881. These Fig. 35. are shown in figs. 35 and 36.… … Fig. 36. chromatic aberrations, but to an equal extent in an opposite sense, so that they form a properly corrected whole. It is claimed by the inventor that by means of this principle a better definition is secured at the edges of the field. The maximum aperture of the portrait lens is f/3, and of…
Photography
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