The two mf projectors I have are the Rollei P11 with a standard 150mm f2.8 Heidosmat lens which can project 24x36mm, 4x4cm and 6x6cm slides, and, a nice working Kindermann 6x6 Super with a 150mm f3.5 Patrinast lens. The Rollei needs a little work from non-use, though.

Marc