For a long, very long and painfully approached the purchase of this lens. I chose between it and Tamron SP AF 17-50mm F / 2.8, especially since the latest version of Tamron was equipped with a stabilizer. I tested it in stores, crawled through the forms, but in the end I chose Canon. Maybe the red stripe and the letter L worked in a certain way. According to subjective feelings, the native lens seemed to me better. It focuses faster, the angle is wider. They often write that they come out HA - I haven’t noticed yet, but if they come out, DPP\Photoshop heals. Plus - this is a good sight for the future if I go to full frame. You can evaluate the photos on my page in the album "About Hong Kong". I recommend to buy, you will not regret it!