Another fun lens is a Vesta. I have a Vesta by another name (Seneca Portrait F5, 6 1/2 x 8 1/2). They were sold by Wollensak under a variety of names. There's one up on Ebay right now as a SeRoCo Portrait lens. As a Sears, most people won't recognize it as a Vesta, and so it will probably go cheap. At portrait (headshot) distances, it probably will cover 8x10, possibly missing the corners. It is also convertible, and covers 8x10 handily when converted, although I think it loses some of the soft-yet-sharp effect when converted. For some examples from it, everything shot on this page was done with it: