Topogon
Encyclopedia
Topogon is a wide field symmetrical photographic
lens
designed by Robert Richter in 1934 for Zeiss Carl FA
. Lenses produced under the name Metrogon
also cite the US patent of the Topogon design.
Topogon lenses have been produced in f numbers ranging from f/3.5 to f/15 in various various focal lengths
.
Photography
Photography is the art, science and practice of creating durable images by recording light or other electromagnetic radiation, either electronically by means of an image sensor or chemically by means of a light-sensitive material such as photographic film...
lens
Lens (optics)
A lens is an optical device with perfect or approximate axial symmetry which transmits and refracts light, converging or diverging the beam. A simple lens consists of a single optical element...
designed by Robert Richter in 1934 for Zeiss Carl FA
Carl Zeiss
Carl Zeiss was a German maker of optical instruments commonly known for the company he founded, Carl Zeiss Jena . Zeiss made contributions to lens manufacturing that have aided the modern production of lenses...
. Lenses produced under the name Metrogon
Metrogon
Metrogon is a high resolution, low-distortion, extra-wide field photographic lens design, popularized by Bausch and Lomb. Variations of this design are said to have been used extensively by the US military for use in aerial photography on the T-11 camera .The most common Metrogon lenses have a f...
also cite the US patent of the Topogon design.
Topogon lenses have been produced in f numbers ranging from f/3.5 to f/15 in various various focal lengths
Focal length
The focal length of an optical system is a measure of how strongly the system converges or diverges light. For an optical system in air, it is the distance over which initially collimated rays are brought to a focus...
.