I decided to buy it as standard zoom lense, instead of having recommended kit lense for EOS 7D. I am glad I made a right choice, otherwise, I could have spent twice both on kit lens and EF 17-55.
Its a great buy, stable with 2.8 gives a great changes to enhance the quality of work.
November 7, 2013
This lens, even with the EF-S format and inferior build quality, produces surprisingly good images, outcompeting even such "L" lens as 24-105/4 L IS USM. Particularly related to chromatic aberrations which in this lens are neglegible.
May 28, 2013
Very good and quite bad...
I've hade this lens on my second body (7D) for nearly one year and I still think that's the best APS-C standard zoom on the market, as far as optical performances and focal range are concerned. Distortion at shortest focals is an issue and corner sharpness wide open is not impressive at all, but that's to be expected considering the kind of lens. What you wouldn't expect from such a lens, considering its price, is the poor built quality. It's not terrible, it's just not in line with the price. Same thing for the expensive hood, sold apart. I really hope for a "Version II" with a better built quality.
May 20, 2013
Badass but dusty
This lens is really great, it's super fast and quiet even in low lighting. Portrait are beautiful less noise then my old lens. I fell in love with this lens after upgrading it from my EF-S 18-200mm f/3.5-5.6 IS. It doesn't have the zoom range as the EF-S 18-200mm and a lock, but it's lighter. The build quality is bit similar. The EF-s15-55 get really dusty inside easily and fast though which I don't like. I would love to see an update of this lens.
L build quality.
EF 24-70mm f/2.8L II USM & EF24-70mm f/4L IS USM Features.
April 8, 2013