Just to temper the Zeiss-Ikon Super Ikonta enthusiasm with a bit of reality: the film advance on a lot of these Super Ikontas was engineered for a thick film base and it's pretty common to have overlapping frames with modern films. There are some klugey ways to get around it if that kind of thing doesn't bother you. See http://www.apug.org/forums/forum51/9...ikonta-iv.html