Nasmyth focus

'Nasmyth focus' can also refer to...


More Like This

Show all results sharing this subject:

  • Astronomy and Astrophysics


Show Summary Details

Quick Reference

A focal position for a reflecting telescope, to which light is reflected along the hollow declination axis or altitude axis of its mounting. At the Nasmyth focus, the image position remains stationary and heavy equipment can be used without affecting the balance of the telescope. The configuration was devised by the Scottish engineer James Nasmyth (1808–90).

Subjects: Astronomy and Astrophysics.

Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.