Alan Chan wrote: > > You will never get the full story from consumer report because it takes time > to show the weakness of certain products. For instances, some Sigma lenses > scored well in test reports but degrade quickly mechanically.
Alan, I don't know anyone who has bought a Sigma lens that ever lived up to the wonderful optical performance of those samples made available to magazine reviewers. I'm told that one reason Sigma glass gets good reviews is that the reviewer always gets to keep the lens ... I coveted the Sigma 15-30mm EX lens after reading a review in "Amateur Photographer" which praised it to the heavens. However two friends bought them and were extremely disappointed. One got a refund, the other got a new lens and *then* got a refund, because it was even worse than the first. John
