Price performance ratio! 5 3

The price performance ratio of this lens and the imaging performance is OK. Also own the 28-135mm IS USM Canon and have to say that when the setting is correct (mostly manual focus and aperture 7.1) of the sigmoid colon, the imaging performance is indeed worse than the Canon, however, but still in the acceptable range. The only thing that bothers me a bit that you should focus on this area always compatible himself, since the AF on my 450D with this lens very rarely meets, especially in distant landscapes or 70mm. An error of the 450D is excluded, as the Canon 28-135mm IS USM or the 18-55mm kit lens ever meet. Had 2 different Tamron 70-300mm to test at home. And both had the same bad front focus, which had taken a lot worse than the Sigma, but the contrast and the color was a little better.

The Canon 70-300mm IS USM meets determined better and you do not manually focus no question, however, it will cost about 400 more. And since you should use at focal lengths above 200mm anyway a tripod, the 400, a wrong investment for the Privatman does not have to sell the photos.

What is worth mentioning in any case, is the gröstmögliche magnification of at the Sigma at 1: 2 and Genuine Canon approximately 1: 3.8 is thus allowing quite nice macros.
For 130, this lens is quite interesting in any case.