are people who never know better lens or compare this lens with even cheaper lens. from a very pro critical point of view, this lens is fairly priced middle level lens.
If you want better lens cover 28-135 focal lens, you will either go sigma 18-200 OS, 540 dollar
24-70F2.8, 1100 dollar
24-105 F4 1000 dollar.
if you compare lens in the same price range, this lens just damn worth the money. sharp!
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