Wollaston landscape lens

The Wollaston landscape lens, named for William Hyde Wollaston, was a meniscus lens with a small aperture stop in front of the concave side of the lens, providing some improvement of aberrations. It was devised in 1812. It was the first reasonably sharp over a wide field (about 45° at f/11[1] or f/16) lens. Wollaston fitted it to an artist's aid camera obscura in 1812.[2]

Wollaston Meniscus

This lens was still used in low-priced cameras in the mid-20th century.[3] Besides its cheapness, the lens has the advantage of having only two glass-air surfaces.

References
  1. Handbook of photography, Whittlesey House, 1939, p.37.
  2. Kingslake 1989, pp. 23–26, 307.
  3. Johnson, Charles S, Jr. (2010). Science for the Curious Photographer, p. 11. A K Peters, Ltd. Natick, MA. ISBN 9781568815817


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.