mhayashi: please would you measure the thickness of your 3A WHS. I appreciate tolerances may be different but I'd like a reference starting point. Thanks.
mhayashi: Thank you very much
Kiwi7475: The Dallmeyer lens catalogue I've seen lists this lens as a 16 inch focal length. I think the difference in diameter is to do with the relative diameter as seen through the lens compared to actual diameter as calculated. Steven described this better than I can further up in this thread.
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