Review: Sigma 180/3.5 vs Canon 70-200IS

Discussion in 'Canon EOS' started by edward_h, Aug 17, 2005.

  1. I've loaned a Sigma 180 and compared it to the 200IS.

    Might be of interest if you're interested in a 180.
  2. Pretty grim for the Sigma!
  3. That looks like a defective lens. I wouldn't want to draw any conclusions unless that's the best it could do after being serviced or exchanged. Did you check it using manual focus?
  4. I would vote for a defective Sigma. I have both Sigma 180 and Canon 70-200IS and can assure you that the Sigma 180 (original version) is much better than your tests show.
  5. Hmmm, the Sigma in Macro is sharper than the zoom. Naturally it would be, but it if it was defective one would expect it would be bad in macro too.

    So it kind of looks to me that the Sigma is front-focused on the wall and the improvement is puerly down to the DOF increasing at smaller apertures. The fact that it was tested twice doesn't mean it didn't front focus twice. Try it with manual focusing again.
  6. Focus issue for certain. Even consumer lenses don't perform that poor. It's best to manual focus with magnifier to be fair.

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