BACK
NEXT
SSPL_10240460_preview
10240460
Add to Lightbox Add to Lightbox Buy Image Buy Image

This image is protected by copyright law. Please contact us for advice on our licensing terms, before reproducing it for commercial purposes.


To save a small version of this image for mock-up or research purposes, right click (or control click on Macintosh) and Save Picture As...

Nasmyth’s 20 inch reflecting telescope, 1850-52.

James Nasmyth (1808-1890), a successful entrepreneur, built this reflecting telescope at his foundry in Patricroft near Manchester around 1850. With a 20 inch (508mm) speculum (metal) mirror, it originally had an optical configuration with the eyepiece perilously located at the top of the tube. To improve matters, Nasmyth added an extra mirror which lengthened the light path so that it was directed through the trunnion axis of the turntable stand. This optical configuration is now used on modern telescopes and is called the Nasmyth focus. From his drawings of the Moon, Nasmyth made relief models of the lunar surface. These were then photographed with suitable lighting, producing more lifelike results than the direct lunar photography of the time.

Image No. 10240460 | This is a Rights Managed image.

Inventory No.: 1933-0021
Credit © Science Museum / Science & Society Picture Library -- All rights reserved.
Search for related items:
To search for related items, choose from the following related keywords. To search multiple keywords, select multiple checkboxes and click Search Selected. To search for a single keyword, click the keyword itself.
Show items that have:
View Lightbox View Lightbox Print Lightbox Print Email Lightbox Email Copy Lightbox Copy Rename Lightbox Rename Delete Lightbox Delete