Originally posted by: pyonir
Nice lens man. I've heard great things about it.
I have the Sigma 70-200 and i wish i had gotten the Canon. It isn't as sharp as i'd like, and im not sure how to describe it, but the Canon, the colors are more defined...like on my Sigma, the contrast looks blurred, or blended. I guess it goes back to the sharpness factor. It's soft at 2.8 and it's soft at 200mm. Two things i'm not pleased with. but it saved me a grip of money too...so...i just wish i had gotten the Canon one.
I do have a Sigma 24-70 2.8 and i'm VERY happy with that lens thus far.
You could sell the Sigma for around $650 and get a Canon 70-200mm f/4L for around $450. From a sharpness perspective, since the Sigma is soft at f/2.8 and sharp at f/4, I would consider the lens essentially an f/4 lens. In contrast, the 70-200mm f/4L is sharp at f/4 and at all focal lengths, and still stays really sharp with a 1.4X TC. This is one of the reasons I didn't go with the Sigma 70-200mm. I would be using f/4 95% of the time, and only using f/2.8 if I really really had to.