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i'm looking to get a new lens in the wide angle category of some sort soon. i currently have an 18-55 IS fulfilling my wide angle needs. I'm looking to either replace it with the 17-40 L or perhaps a third party ultrawide such as either of the Tokinas (11-16, 12-24) or a Sigma. The 10-22mm is out of my price range. i have a friend (nikon shooter) who enjoys his Tokina 12-24 a lot, i own a Sigma 50-150 f/2.8 and love it, so i have no problems with a third party lens. My question is more along the line of should i replace the kit lens or expand my focal range?
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