Sigma 30mm f/1.4 E-mount lens has one bug (likely to be fixed via firmware upgrade)
On the German Forum Dslr-forum.de Sigma 30mm f/1.4 lens owners spotted a specific issue: The lens takes unsharp pics when shooing at f/2.0 aperture with AF-S focusing via the EVF. Sigma germany acknowledge the problem and is working to fix it.
I am sure Sigma will fix that issue as this sounds a lot like a software issue. There is really no reason to not buy this lens also because it’s the best APS-C E-mount lens to date according to DxOmark.
Get the Sigma 30mm f/1.4 E-mount lens at [shopcountry 49396].