Vente aux enchères en direct 5506Travel, Science and Natural History
A 4-inch Crown Glass Bullseye lens
Lot 72

A 4-inch Crown Glass Bullseye lens

ENGLISH, CIRCA 1860

Fermé8 October 2014

Prix réalisé

GBP 625

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A 4-inch Crown Glass Bullseye lens
English, circa 1860
the green-tinted planoconvex lens supported in cast iron stand
12½in. (31cm.) high

Note du spécialiste

A didactic lens to demonstrate the principle of longitudinal spherical aberration.