The Canon EF 24-70mm f/2.8L II USM (price & specs) has been analyzed by DxOMark. And it scores really really good, they call the lens a «peerless performer». If it wasn’t for the price (it’s $2500), this would be a dream lens, even without IS (my take)! DxOMark writes in the conclusion (emphasis mine):
With an DxOMark score of 26, the Canon EF 24-70mm f/2.8 MkII is the highest scoring professional fixed-aperture mid-range kit zoom of any brand in the DxO Mark database and comfortably outperforms rivals as well as the firm’s earlier Mark I version, particularly with regard to the sharpness levels across the frame. We’re used to seeing a noticeable deterioration in performance in the outer fields at longer focal lengths even with high-quality optics from the big-name marques but the new Canon bucks that trend. As for distortion and vignetting, it manages to hold its own against rivals even if it hasn’t quite managed to improve on those over the outgoing Mk I version. In spite of the complex optical construction, some chromatic aberration is visible in the corners that may require additional removal in post-production software but levels remain in line with the best of rival offerings. The main downside, however, is the very high price. At $2,500 the lens is far less accessible than the model it replaces, but the reduction in weight and size coupled with the boost in optical performance looks set to satisfy future demands from as yet unannounced high-resolution cameras.
Interesting, and plausible: the EF 24-70mm has been designed with future DSLRs in mind. Please Canon let us know what is in your labs.
The pros and cons of the EF 24-70mm f/2.8L II USM seconding DxOMark:
- Good sharpness (16P-Mpix), only equalled by the Sony Zeiss equivalent.
- Distortion well controlled
- Transmission improved
- 805g total weight (145g lighter than predecessor).
- Compact design.
- CA noticeable in corners.
- Large (82mm) filter diameter (though front/rear element are protected with a fluorine coating)
- Very high price