Before that, I went with a similar Sigma. Earth and sky - Canon is many times sharper in the open than Sigma at 8-9, colors are not distorted, focus is faster, stub is better. A real travel zoom, a very handy thing on any trip. Repulsed my desire to carry over the hill 24-70 and 70-200. With its pros. Range. 11x is strong and comfortable. Normal design - nothing backlashes and does not leave, although this could be expected with such a length of the trunk. The stub performs 3-4 steps perfectly, while being very quiet and not too gluttonous in terms of battery. I completely disagree with those who broadcast about soap and HA. The open aperture is fully operational and close to the maximum resolution of the lens. There are no significant chromatic aberrations in thousands of shots taken under various conditions. Got cons: Thin and inconveniently placed manual focus ring. "Barrel" at a wide angle. Expensive, especially given Canon's meager package.
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