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Sigma 400mm Non APO Stripdon help.
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PostPosted: Thu Jun 28, 2012 1:52 pm    Post subject: Sigma 400mm Non APO Stripdon help. Reply with quote

Hi,
first post here, can anybody help with details of the lens groups in the Sigms 400 Non APO lens, especially the rear element set, I have one of these that I have stripped for cleaning and I think I may have put the rear elements in the wrong order.

Dave.