Xenon (lens)
The xenon is a developed by Albrecht W. Tronnier in 1925 and designed by Jos. Schneider Optische Werke produced a photographic lens. The type of xenon objective is derived from the Gaussian double objective .
Lenses that were offered under the name Xenon based on Tronnier's designs are usually 6- or 7-lens lenses of the Gaussian double lens type. All three elements of the front lens group can stand individually. The regular models were based on a number of Tronnier patents for Schneider-Kreuznach, his employer at the time . Examples include the German Reich patent 439,556 from 1927 and the US patent 2,106,077. The original design was for a lens with a light intensity of f = 1: 2.0 at an angle of view of 50 °. Based on the basic type, the designs have been continuously developed, taking into account the possibility of surface treatment or the availability of new optical glasses.
Individual evidence
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