If anyone is still following this thread after the detour to print size ... I have tested the 50f1.8 MIJ against an earlier version 50f1.8 (though not a silver nose). There was a noticeable difference, and the slides from the MIJ were sharp enough to cut yourself on. I have not tested the f1.4 against the MIJ, but really fail to see the advantage in the slight difference in aperture.