I took a few shots of my backgarden at f/16, and zoomed in 100% (!). You could say I'm picky (I am!), but I wasn't entirely satisfied with the results. I may be being a bit hasty here, as I mentioned in my original post, I took some colse up portrait shots at 40mm, and these are very sharp. The lens seems to be at it's worst at the wide end. But this was to be expected.


I'll persevere, and get back to the seller if necessary.


Many thanks for the information Daniel.


Cheers.