Illustrated catalogue of the Royal Photographic Society's international exhibition at the Crystal Palace, 1898 (1898)
Royal Photographic Society International Exhibition (1898 : Crystal Palace, London, England), Royal Photographic Society of Great Britain · London : Royal Photographic Society · leaf 138
e made in/twelve sizes/from i to 12 inches focus. 54 Ross-Goerz, Series III. Ross, Ltd. Introduced in 1892, in thirteen sizes: 3J inches to 35 inches. Angle in¬ cluded, 70° to 90°. Rapidity, //y*7. A symmetrical doublet, each combina¬ tion being triple. English patent, 23378/92. German/patent,… … 56 Rapid Aplanat. C. A. Steinheil Sohne. Series II, //6*5. Unsymmetrical construction of 1893. Five lenses, the front lens double, positive, the back lens triple, negative. 24 cm. focus. Iris diaphragm. 57 Zeiss Anastigmatic Lens. Series Ila. Carl Zeiss. Ross, Ltd. 58 Ross-Zeiss Anastigmatic Lens.…
Royal Photographic Society of Great Britain · Photography, Artistic
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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