It makes sense to buy this lens for full-frame shooters, or for those who plan to switch to it soon. For those who stop at the crop, there is an excellent 17-55 / 2.8 IS lens. Both 24-xx L-zooms lose their wide angle on the crop, which makes them unsuitable for βregularβ use. 24-105 makes sense to compare only with 24-70, as it is the closest to it in class and price. It is not worth comparing it with budget zooms like 28-135, this is a technique of a different class, therefore, in the pros and cons, the properties are indicated relative to 24-70. Both lenses have their pros and cons, however, these reportage lenses are approximately the same level, and even comparing them head-on, it is not easy to distinguish the high-quality images obtained from them. The 24-105 is great as a general purpose travel zoom. Where you can take only one lens, 24-105 is appropriate, which is why Canon is trying to sell it in a whale with 5D / 5D II. The presence of a stabilizer and especially a segment of 70-105 really helps. For those who need a high aperture ratio, the choice is also obvious - this is 24-70. A stabilizer does not replace aperture, and aperture does not replace a stabilizer, so it is important to understand your needs and make the right choice.
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