Product description. Sigma’s 24-70mm F2.8 IF EX DG HSM is a replacement for its older 24-70mm F2.8 EX DG Macro lens. This large aperture standard zoom is considerably more compact than its predecessor, thanks to a brand new optical design which features 14 elements in 12 groups, including three aspherical, one ELD and two SLD elements.
Sharpness alone does not make a good lens. Bokeh quality, not just quantity come into play as does sunstars, contrast rendering, and flare resistance. The 28-70 combined with those and f/2 access makes for dramatic shots. The sort of shots I got from the EF 24-70 f/2.8L II on a 5D III (my favorite color renderer) come to mind but having f/2. With both the Canon 6D and Canon 6D Mk II, the Tamron 24-70mm f2.8 Di VC USD is simple and accurate to focus with. In fact, for the first time I’ve found a lens that can autofocus well with the Resolution and 50% MTF are better in both the 28-70mm and the 24-70mm f/2.8L zooms than in the 28mm f/2.8 prime. 50% MTF is better in the 24-70 than in the 28-70. 50mm The 24-70 has better MTF performance than the 28-70 at f/2.8 and f/4. The 50mm f/1.4 prime outperforms the zooms at f/4 and f/5.6. 70mm After contemplating for a while, Which 24-70mm f2.8 lens to go with Sony a7riii, I concluded on Canon 24-70mm f2.8 mark ii, which has relatively better image quality. Not according to rigorous LensRentals tests and my own personal experience. I extensively shot the Canon 24-70mm f2.8 II on 5DSR's for two years and on the A7RII for a year.