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Nasmyth telescope, historical artwork

Nasmyth telescope, historical artwork

R102/0215

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Credit

ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY

Caption

Nasmyth telescope. Historical artwork of the 20 inch reflecting telescope developed by James Nasmyth (1808-1890), a Scottish engineer and inventor. It was a combination of Newton and Cassegrain designs with a concave primary and a convex secondary mirror (like in the Cassegrain) and a tilted flat mirror (like in the Newton) to redirect the image outside the side of the telescope at the pivot. Nasmyth placed a seat at the right height for the eye-piece, and the whole contraption on a turn-table, so the observer would never have to move from his seat. Illustration from James Nasmyth: Engineer, An Autobiography, published 1885.

Release details

Model release not required. Property release not required.

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