DxOmark tested two great lenses:
1) The Sony FE 28-70mm lens (Click here to read the test). The surprise is that it is almost as good as the 24-70mm FE Zeiss:
Although enthusiasts will head straight for the Zeiss, anyone on a budget won’t feel short-changed from the Sony 28-70mm f3.5-4.5. It has some shortcomings, particularly with regard to uniformity at the wider apertures where it’s easily outclassed by the Zeiss but the Sony puts up a good fight overall and doesn’t cost the earth.
2) Samyang 24mm f/1.4 A-mount lens (Click here to read the test):
Wide-open performance isn’t particularly impressive but sharpness improves noticeably at f2.0, at least in the center of the field. Transmission when measured on the A99 is excellent and both distortion and chromatic aberration are very well controlled. Vignetting is heavy at the maximum aperture but it’s not unexpected and hardly a serious problem.