I have recently been using a Vivitar 6-element enlarging lens that came with a Durst M305 I acquired, and I was just curious as to which manufacturer(s) Vivitar sourced their 6-element lenses from? It's 50mm f2.8, and is marked "lens made in Japan". I've heard that at one stage top Vivitar lenses were German, so this has thrown me a bit. Just curious, really, as it really does seem to be a good'un!
