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Part
of a composite eyepiece
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Inv.
3449.15 V.15 Part of a composite eyepiece First half of the eighteenth century Cardboard, Florentine paper Length 140 mm |
Description Erecting tube belonging to terrestrial telescope V.31. It slides in the terminal part of the first section of the telescope, where it is stopped by a small collar. It contains two biconvex lenses whose focal length is 70 mm. |
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