Metrogon
Revision as of 11:18, 22 February 2011 by Heritagefutures (talk | contribs) (new page .... I will shoot and upload some good images of a Metrogon in the next couple of days...I have a K-20 lens cone in mint condition...)
The Metrogon is an extra-wide field photographic lens used extensively by the US military for use in aerial photography. The design is by Bausch & Lomb based on the Topogon design by Zeiss. It is composed of a double-Gauss design with an extremely curved meniscus to provide a 90° field of view. The lens is symmetrical front to back. The two outer positive elements are of high index crown glass while the two inner negative elements are of a high index flint glass.[1]
