The optics of photography and photographic lenses (1904)
Taylor, J. Traill (John Traill), 1827-1895, Everitt, P. F · London ; New York : Whittaker & Co. · leaf 199
AM Astigmatic lenses. i 87 Second Series, now known as the Orthostigmat, Type II., is shown in fig 60. Here we have another instance of a lens construction being worked out independently by two opticians. Dr. Kampfer, a director of the firm of Voigtlandcr & Son, of . Brunswick, applied for a patent… … FIG 60. But although his application was refused, he ap- pears to have been more fortunate in the treatment he received at the hands of Dr. Rudolf Steinheil than the latter received from the Charlottenburg firm. Dr. Steinheil granted Messrs. Voigtlander a free licence to manufacture Type II.,…
Photographic optics · Photographic lenses
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