Anastigmat
An anastigmat or anastigmatic lens is a photographic lens completely corrected for spherical aberration, coma, and astigmatism. Early lenses often included the word Anastigmat in their name to advertise this new feature (Doppel-Anastigmat, Voigtländer Anastigmat Skopar, etc.). All modern photographic lenses are close to being anastigmatic.
![](../I/m/Lens_anastigmat.svg.png)
The first Anastigmat was designed by Paul Rudolph for the Carl Zeiss AG in 1890.
Many telescopes are three-mirror anastigmat.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.