[stoppingdown]

I just ran the test on my just arrived Sony 4/10-18mm... Former attachment is focused, latter is slightly defocused. It has been taken according to the suggestions, but I didn't use the tripod: I think it's ok because the lens is stabilised. The focused image doesn't look decentered, or at least too much; the defocused image looks it is. Your opinion?

 

Now, the practical question. I've bought through Amazon and I think they shouldn't contest a return because of a defect, and send me a replacement. But how many chances I have that the new lens is better (above all, how many chances about one which is worse)? I mean, if my current sample is just slightly decentered, is it worth while asking for a replacement? Does somebody have some experience about how many times Amazon would satisfy a replacement request? Thanks.