Information for this purpose allows the realization of good photo, it has a good dive can distortion and chromatic aberration in the major part of the range of use, it has a very very good value for money.
I use it on my K5.
We see all the same despite the fact that it is WR (tropicalized) a level of production at low cost (eg the upper lens of my model does not have a clean cut).
In any case, an objective that we do not regret going out in all weathers, and ideal for beginners who want to take photos without being ruined.
I only regret the lack of information regarding the presence or absence of a pars sun in the description.
whereas on the picture there by step, there is a well.
Otherwise delays reception magical, ultra fast well conditioned.
I make a double by purchasing a sun, for nothing.