its not a bad lens but the panny kit zoom is a little better and more robustly built , i sometimes use a half pound wide oly a -28 adapter on the front of the panny kit zoom and it works splendidly and give a nice wide and corner sharp contrasty image,
unfortunately if you tried something like that with the oly kit zoom , you would get a lens error message, i guess the special construction to allow the lens to collapse weakens the construction somewhat , when i had the oly zoom i took some outstandingly sharp pictures with it , optically it is no slouch , but i traded it away for a 17 2.8 and finder which is my only af m4\3 prime to date