on a crop it will not show all the advantages of a wide angle, but it is quite enough to consider it a "regular"
A few shots using this stick:
http://500
http://500
http://500
http://500
http://500
Pros
Compact, not very heavy, UNKILLABLE (fell several times) allows you to shoot from a very close distance, which is nice - the need for a macro lens has turned into a "desired need"
Cons
Sometimes lathers, at 60 where you have to turn up the sensitivity, you want, of course, 2.8, but taking such a lens on 60 sometimes you want stronger cups :)
Chromatic aberrations are visible at 17mm, sometimes very noticeable - http://500