What size lens boards does your camera take? A nice lens would be something like the Dallmeyer 3A. But you will need at least a 6x6 if not larger lens board to mount it on. When you're talking about F4 lenses they can get pretty huge. The 3A has waterhouse stops that will give you the depth of field needed for landscape and it will still cover 8x10 and 11x14 at portrait distances. Also a large Jamin Darlot would be nice for portraits.