9 out of 10 points and recommendedBuild, Contrast, FocusingA bit short on the 30D
This color rendition and contrast of this lens is fantastic, as is the autofocusing. I bought this lens as a walkaround for my 30d, and i surely blows the kit lens out of the water.reviewed November 26th, 2006 (purchased for $630)
When using this lens on full frame cameras, I have noticed the the corners are quite soft and vignetting is somewhat substantial. I can't really complain about this though, because it's inherent with most wide angle zooms.
That said, it's a fantastic alternative to the 16-35L if you don't need the extra stop.
Oh yeah... the hood is useless on a 30D or crop camera.