Forums
Large Format Photography
Very interesting and a must for those who want to dedicate to large format. The main page is plenty of information, DIY projects, considerations about cameras, lenses, gear, etc. There is a link on page’s header that leads directly to Questions & Answers Forum. I am member since 2006 and learnt a lot from them.
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Referência
Objectifs Photographiques Anciens
An incredible website. You can research by lenses names, producer, designer, date and number of glasses. It is a huge databank with diagrams and analysis of hundreds, maybe thousands of lenses. There is also a very nice article about Petzval type lenses and history among many other interesting information.
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