There is one for sale on the LF forum, a 305mm G-Claron, which is a great lens (I own one.) I know the seller and he's an honest guy, and the price is spot on. It is a process lens, so at f/9 it is slower than other lenses, and for that reason only might not be ideal for portraiture, but I use mine all the time for landscape and architecture. It is capable of covering an 11x14" negative, so plenty of covering power for 8x10.

Peter Gomena