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Sigma 70-200mm f2.8 EX APO IF HSM

05_03_1_
Review Date: Dec 26, 2004 Recommend? yes | Price paid: $700.00 | Rating: 10 

 
Pros: Price, speed, sharpness
Cons:
it isn't white :D it seems this cause problems for some people

When I bought this gem, it was completely unusable at F2.8 and F4 on my 300D, slight frontfocus at 70 and 200 mm-s good picture at 135mms, so I thought maybe the kens is defective, I was right, the AF system wasn't calibrated well, so I send it for a recalibration, along with my cam... They recalibrated it in one day... then I was astonished by the pic quality at f2.8 it delivers a very good picture - but you need to apply some USM to get a contrasty pic, as you have to do in canon's case... I have a baby L *70-200 4L also, for travelling lightweight, the pics are undestinguishable, except for sigma's yellowish tint, but as I like the canons colors better I get rid of yellow colors in during conversion.
For some days I have a Canon BiGL *70-200 2.8L it was a bit heavier than the sigma, in other terms they qualified the same on my friends 1Ds, i borrowed it for a quick field test... You can justify the canon price if you're a working pro, canon has better mechanism in it's lens, if you do shooting for living you can count on canon, you can count on sigma also but have in mind that the sigma's internal build quality is not the same as canon's, optically they're virtually the same...
If you have a piece that is unusable at 2.8, then make a quick test, then get it recalibrated, or recalibrate yourself, maybe the error was in you...

Greetz Alex