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Sigma 70-200mm F2.8 EX DG APO MACRO HSM

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Review Date: Apr 28, 2008 Recommend? no | Price paid: $800.00 | Rating: 7 

 
Pros: Well built, tripod ring, case, price.
Cons:
Auto focus off at all focal lengths and lens openings. Focus test showed actual focus was about 7/8 to one inch, towards camera body. Manual focus confirmes lens is quite usable at all lens openings, diffraction at small openings, as expected. Several bodies used for test, results were the same. As an owner of 4 other Sigma lenses, this lens is very dissapointing, especially compared to an earlier Sigma 70-210 F2.8 , that i had owned. I took a chance, based on experience, and did not believe other post-i lost. Lens was returned to B & H Photo, for refund. If purchased in Canon EOS mount- it probably will have to go back to Sigma for calibration.



 
Sigma 24-135mm f/2.8-4.5 Aspherical IF

sigma24_135
Review Date: Apr 19, 2006 Recommend? yes | Price paid: Not Indicated | Rating: 7 

 
Pros: Rather inexpensive for the focal length ranges it covers. Lens gets quite sharp as you move away from its widest angle, and away from F2.8. Is useful on all my Canon bodies, film and digital. Focused and gave nice results on each. I think auto focus noise level is about the same as my other Sigma lenses.
Cons:
Its widest angle, 24MM is really not usable at F2.8, in my opinion. However that said i would never use it there. Several times i have also grabbed the manual focus ring, instead of the zoom ring. Mostly due to operator error, or really just getting use to it.