Does Sigma or any other 3rd party maker make a decent if not the same and/or better lens than the current 55-250/18-135 EF-S lens? I owned both and I parted with the nifty two fifty and gave away my 18-135 to my friend for his birthday. I'm in a real lack of a telephoto and loved the range on the 18-135mm because it's semi walk around lens too. I want to stay within maybe a $200-300 budget range; I am aware of the 55-250mm is on sale at Target for $150 but I'm not sure if I want that lens back. Thanks for the suggestions. I don't hate Canon or anything but I'm open to the other makers that's all.
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