Originally Posted by
Hightower
Hello everyone, I am trying to seek help. Does anybody here have this lens? It is Berthiot 520mm f6.3 Special aviation lens. I bought it two weeks ago from an ebay seller, which shall stay unnamed for his own good. Lens was described as fully functional and working, but unfortunately it is completely missing rear focal group (or part). Most probably it is a tessar design, but I was not able to find that info. I am looking for anybody, who owns this lens. Thanks for your help!
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