I'd even say that the 28-300 is good enough for any picture that is not enlarged beyond A4 and not watched with a magnifying glass. It is "human", so to say. That is, provided you got rid of the pincushion distortion that can become nasty, depending on the subject (e.g. cityscapes shot around 110mm FL).
Back to main subject - I am still resisting the temptation to buy a Z5 and make direct comparisons with the Df (a matter of weeks it seems... with Xmas nearing, my defenses are wearing down). My busy agenda keeps me from doing that. Also, I've not had any night strolls for a long time, so the use case "not even being able to frame" has become too rare, alas.
