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"Objectif Universel" Convertible Lens by Darl...
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"Hémisphèrique-Rapide" by Darlot, c. 1866...
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Unmarked Petzval-Type Lens with Rims Engraved...
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Tele Objectif Panorthoscopique by Clément & G...
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Petzval-Type Lens by "Derogy Opticien Succr d...
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"Derogy's Patent VR" Petzval-Type Lens, 1858 ...
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Derogy's Convertible Universal Lens, c. 1860...
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Rectilinear-Type Lens in Prosch Triplex Shutt...
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Landscape-Type Lens Probably from America, c....
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Petzval-Type Portrait Lens by J. Vogel, USA, ...
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A. Grubbs Patent Aplanatic Landscape Lens, No...
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C. Grubbs Patent Aplanatic Landscape Lens, c....
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A. Grubbs Patent Aplanatic Landscape Lens, c....
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A. Grubbs Patent Aplanatic Landscape Lens, c....
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Aplanatic Doublet by Sir Howard Grubb, c. 187...
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Petzval-Type Portrait Lens "A3" by Grubb, Dub...
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Early Landscape Lens, c. 1850...
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"4,2 in. Holos Wide Angle" Convertible Lens b...
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Rectilinear-Type Lens with Built-in Leaf Shut...
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Petzval-Type Lens by Bland & Co. "Opticians t...
