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Inv.
2588 V.22 Objective lens End of the seventeenth century Unsigned Glass, wood Diameter 235 mm |
Description A large biconvex objective lens mounted in a wooden ring. The diameter of the lens alone is 180 mm, the aperture 168 mm, the focal length 18.4 m. The glass, which has a slight green tint, shows elliptical inclusions and bubbles. The surfaces of the lens are scratched. |
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