erian
6-Dec-2019, 14:59
Not much information can be found about Krauss Quatryls. Available catalogs do not mention them. Only possible source I could found was Le Rêve Edition Krauss dossier - N 21 Krauss - Opticien-Constructeur d'Appareils Photographiques français - http://www.lereveedition.com/fr/dossier-collector-21-a-30/n-21-krauss
Dan Fromm deciphered from the tiny screenshot that these were Tessars made after Zeiss patent run out. I can now confirm this from the paper copy.
Le Rêve Edition is not complete. It mentions that Quatryls were made up to 300mm size, both f/3.5 and f/4.5 but I have found a listing that offers 500mm f/5.6 Quatryl. Le Rêve Edition only mentions 460mm f/10 Apo Quatryl but I have also found 840mm f/10.5 Apo Quatryl listed.
This suggest that Krauss most likely made the same nomenclature of Quatryls as they had been making Tessars.
Dan Fromm deciphered from the tiny screenshot that these were Tessars made after Zeiss patent run out. I can now confirm this from the paper copy.
Le Rêve Edition is not complete. It mentions that Quatryls were made up to 300mm size, both f/3.5 and f/4.5 but I have found a listing that offers 500mm f/5.6 Quatryl. Le Rêve Edition only mentions 460mm f/10 Apo Quatryl but I have also found 840mm f/10.5 Apo Quatryl listed.
This suggest that Krauss most likely made the same nomenclature of Quatryls as they had been making Tessars.