The Canon EF 24-70mm f/2.8L II USM is the kind of lens that's always going to be held up to high scrutiny - it's the company's flagship standard zoom for professional photographers, and is expected to deliver top-notch results under all conditions. Happily, that's exactly what it does.
Superb; almost flawless optics; Impressive flare resistance; Fast; silent; and accurate autofocus; Excellent build quality including weathersealing
Unpleasant vignetting in the 50-70mm region at F2.8 on full frame; Noticeably lower image quality at close focus distances; No image stabilisation; Very expensive