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Inv.
2571 V.5 Objective lens 1646 Evangelista Torricelli, Florence Glass, cardboard, leather Diameter 115 mm |
Description Plano-convex objective lens mounted in a cardboard ring with the edge covered in leather. The aperture of the lens is 84 mm, the focal length 6050 mm, the diameter of the ring 115 mm. The glass, which has a red tint, contains elliptical bubbles and some inclusions. One side of the ring is inscribed "Vangelista Torricelli. Fiorenza 1646 Braccia 10.1/4" (corresponding to 5970 mm). |
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