Opticallimits (former known as Photozone) tested the [shoplink 65031]Zeiss 35mm f/1.4 FE lens[/shoplink]. And the conclusion is a bit disappointing:
It isn’t easy to come to a conclusion about the Zeiss Distagon T* FE 35mm f/1.4 ZA. Technically it has some weaknesses but then we have seen these weaknesses in other representatives of this class (high-speed wide-angle primes). The resolution characteristic is great in the image center straight from f/1.4. However, the image corners are not that hot till about f/2.8. Now does that matter from a real-world perspective? Usually, it doesn’t. If you use the lens at large apertures, the corners are rarely of relevance and, most likely, not on the same focus plane as your main subject anyway.
So if you require such a fast 35mm prime lens, the Zeiss is certainly worth a look. However, if you are willing to look beyond the mainstream, you may also check out the new Samyang AF 35mm f/1.4 FE although keep in mind that Samyang doesn’t really have the best record when it comes to centering quality.
I can’t wait to see Sigma releasing their 35mm f/1.4 lens. If rumors are correct this lens will be also smaller than the Zeiss which for me (as a hiker) is very important.
Buy the Zeiss at [shopcountry 65031].