The construction is solid (Made in Japan, metal and some plastic) and is comparable to Canon / Nikon release. The objective is advertised as tropicalized.
The sharpness is rather good dice 2.8 (tested on a Nikon D800). AF is fast but may be slightly less than the Nikon versions. Nevertheless it never failed me.
The VR is very effective and is used to go from February to March of hands stops smoothly.
By cons. It is a working tool.
It is very big and heavy (1.5 kg). Not really the kind of optical convenient to have on vacation. I tested on the occasion of a weekend in Italy and this is not ideal. Rather, I would book it reports in a pro environment where space is not a problem.
