Do you know this lens Bausch & Lomb Portrait 5x7 f5/12 inch.
I found this (see photo), but i don't know if this is the same as this:
http://www.ebay.ca/itm/15-F-4-Petzva...3D281098415522
http://www.ebay.ca/itm/Bausch-Lomb-P...3D281098415522
Why so expensive, and what is the particularity of this lens?
Best regards
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