Review on Sigma 17-50mm f/2.8 EX DC OS HSM FLD Lens: Large Aperture Standard Zoom for Canon DSLR - International Version (No Warranty) by Somsak Pasalae ᠌

I tested this model for a long time, in different shooting conditions, both in the photo and in the video. Good for video, not so good for photos. In my personal opinion, sigma will not jump above its head. Its pros: The picture gives a good one, draws bokeh is also interesting. Light, and the jump between the minimum and maximum focal lengths is not even very visible. In general, as a budget option between the plastic KIT and L options, it will do. Cons below: Long autofocus, compared to any Canon models, does not always fall into focus. Harsh rings, you can forget about smooth scrolling. Fuzzy ring retainer, difficult to fix and difficult to remove from the retainer. In a word, everything is clumsily done.