Blurring, in my opinion, is harsh (this is very subjective, of course, therefore not in shortcomings). And in bright light (sun) it becomes quite pleasant. Often I carry only it, almost always enough. A plastic mount with a low weight - I think, rather, a virtue. With its pros. Light; luminosity; convenient focal; fast and accurate autofocus. Has some cons A little bit cheaper with the same quality - it would be ideal. But it is, nitpick.