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Rapid Aplanat query
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PostPosted: Tue Apr 13, 2021 4:50 pm    Post subject: Rapid Aplanat query Reply with quote

Eyeing a vintage brass lens it list as rapid aplanat #3 Is there any way to tell the FL from this information.

PostPosted: Tue Apr 13, 2021 6:20 pm    Post subject: Reply with quote

260mm? https://www.largeformatphotography.info/forum/showthread.php?78050-Busch-Extra-Rapid-Aplanat-No-3