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Steinheil Aplanat 51 lin., 1893...
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Lerebours Landscape Lens (Petzval Type), c. 1...
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Jules Vogel Petzval-Type Lens, c. 1875...
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Voigtländer ...
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Early Landscape Lens from England, c. 1865...
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Archive of Original Correspondence between Ro...
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Steinheil ...
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Steinheil Aplanat 27 Lin., c. 1872...
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2 Early Steinheil Lenses, c. 1870–75...
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Steinheil "Triplar f 500 mm 1:4,3", c. 1930...
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Steinheil Gruppen-Antiplanet 43 mm, 1887...
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Steinheil Gruppen-Antiplanet 64 mm, c. 1885...
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14 Steinheil Lenses and Prototype Lenses...
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Steinheil Unofocal 6/24 cm ...
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Wide-Angle Lens 6 ½ Holostigmat, c. 1905...
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13 Lenses...
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Suter Catalogues, 1902 onwards...
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"Theorie und Geschichte des Photographischen ...
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Dallmeyer, Ross, and Thornton-Pickard Catalog...
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German Literature: Optics/Lenses, History and...
