2.Abbildungsqualität:
well at open aperture - without vignetting by setting the Sony case, from aperture 4 very good, with excellent
I'm a bit cautious because I would resort to other lenses, because my expectations are high.
in a comparative test with my Sigma 17 - 70mm Zoom 2.8 to 4 can be found at 35mm setting no sharpness improvement. The only advantage is the profit about 2 exposure levels.
For some photographs, it is good and also because of the low weight with good value for it -is ok, otherwise it would not be my claim.