Lensrental tests Sony lenses...
http://www.lensrentals.com/blog/2015/10/sony-e-mount-lens-sharpness-bench-tests
For those who would rather not wade through the whole thing this is The End bit...
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So What Can We Take Away Today?
Mostly we are just starting with FE lens testing. Over the next few weeks, we should get a good handle on how the Sony lenses compare to each other.
I think there's no question we've seen support for what a lot of people are claiming: the 35mm f/1.4 ZA lens is very likely to have some tilt with one corner or side out of the plane of focus. Depending on what you photograph this may make no difference to you, or may be a huge issue. But I doubt sending copy after copy back is going to make much difference (you may trade a soft right upper corner for a slightly soft left side, etc.). We've taken a couple of these apart and there's not a ton of optical adjustments that can be made: there are a set of shims behind the front group that can be modified a bit, but it's a crude and very time-consuming adjustment, so I don't think it's generally going to be something that can be fixed.
The 55mm f/1.8 is really a good lens, very sharp and consistently made. The 90 mm f/2.8 is a decent lens, reasonably sharp, but there seems to be a fair bit of copy-to-copy variation in overall sharpness.
All that being said, these lenses may look better on-camera than on the optical bench because there seems to be at least some modification of files as the raw is written. We'll get a better handle on that as we test more lenses. And let me emphasize, the only clear evidence we see for that is with distortion correction. There may be nothing more than that going on."
I'm a bit disappointed with the 35mm f1.4's showing but to be honest I can't see myself buying this lens anyway as I like a more compact set up. Looking on the bright side though 35mm f1.4 owners may have to look closely into the corners to see any real world issues.
Anyway, it's there to be read.