Just to come to Chris' defence - the problem was not so much AF, but that when he focused, the whole OS/IS (whatever you want to call it) function would make the entire image shudder in the viewfinder. That is NOT normal behaviour. Whether it's a cheap or expensive lens, the OS/IS doing that isn't right.
You've made good points Chris, although the slowness of the lens/AF speed was mentioned (by myself and others earlier on in the thread).
Dave
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