Hey guys does anyone has a clear idea of what mounts offer the thinnest adapters ? Like, it seems (visually, haven't measured them) that the FD to NEX is thinner than say, the M42 to NEX, etc... I know some Leica mount has the thinnest adapter of all, but then those lenses are not in my budget ! Just trying to figure out what would be a good compromise between IQ, ease of use, and overall package size. I have 2 OM lenses that are tiny but the adapter looks pretty thick.