I don't know if a thread like this has ever existed, but as far as I can remember, it hasn't. Since I'm mainly using 4/3 lenses on my E-M1, Zuiko 9-18mm f/4-5.6 and PanaLeica 14-50mm f/2.8-3.5 at the moment, this is a subject that is of particular interest to me. Hopefully, I'm not the only one, since some of these lenses are great classics. Here's my first contribution, processed with Silver Efex.
E-M1 with PanaLeica 14-50mm f/2.8-3.5 4/3 @ 50mm and f/4