> when stopped down to f5.6-f11, holds its own even today This is also true of the K-mount version of the lens. Compared to many of the other 50-ish K-mount lenses, the K 55/1.8 might be somewhat soft wide open, but starting at f/8 (I would say) it is really very sharp. It's almost as if the lens has a "split personality".
Fred
