I have a 10" Tele-Optar that I use for portraits on a 4x5 Speed. Mine is a barrel lens (not mounted in a shutter), so with this lens I use the rear FP shutter. Barrel lenses go for much cheaper than lenses mounted in shutters. The subjects like the results -- the lens is softer than modern lenses. Out-of-focus backgrounds look nice too.
A 10" lens on 4x5 is roughly equal to an 80-85mm lens on 35mm.