fishstickmonkey: Galileo’s objective lensAuthor:Vittorio Crosten (frame)Date:lens: late 1609 - early 1610 / frame: 1677Materials:lens: glass, gilt brass / frame: ivory, ebonyDimensions:lens diameter 38 mm / frame 410x300 mmObjective lens used by
tags: ciel62,
from: https://ciel62.tumblr.com/post/111570928036
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