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Review title: Best telephoto lens at $200!!
Product review: The lens offers superb sharpness and colors at the 70mm end, but when it goes to 300mm, it starts to have some minor sharpness issues around the borders as well as some chromatic aberrations. But none the less, this lens's sharpness and speed definitly exceed its price(totally). The lens's Macro feature is also a nice addition.*ALERT to canon users: The lens i got started to make "error 99" issues on my Canon XT after 20-30 days of purchase(although it produced some amazing pictures within that time period...). I think the problem originated when I switch a Canon lens (while it's set to a very low f-stop) to this Sigma lens(which has f/4-5.6). Anyways....Be careful when you switch alot between Canon and Sigma lenses, because someday this lens might fail on you....This may be that I got a bad copy of the lens...or just that I messed up my camera somehow..But the extraordinary performance of the lens(as well as the price) definitly deserve its 5 stars rating!
