let me apologize if this thread was asked before but i looked around and found the thread with sigma/tamron 17-50mm ... i prefer to ask about the 17-35mm relatives.
i am planning to buy a Canon EF 28-135mm IS USM for my walkaround lens. and i plan to buy EITHER the Tamron or Sigma 17-35mm ... i am just wondering, anyone who has experience or used either of the lenses?
which lens has better optics? or has better technology with it?
did the both lens get out the same year?
just a few questions, in my mind.
hope you guys could help me.
PS. Both lens are in the range of 400USD.
THanks in Advance.
Tamron 17-35mm

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