I just noticed the other day that a much more complete range of Zeiss lenses are available now with Canon mount. I love my 5D but not sure the Canon wides take full advantage of its IQ potential. Aside from fixing edge softness though (my 28 Canon really loses it on the edges), how would Zeiss optics affect the overall image? I'd assume contrast would be stronger, but I'm wondering if the potential of Zeiss glass would be wasted on a camera with the low pass filter that Canon uses. Anyone taken the leap and tried one of these manual focus primes? I'm thinking if I got one it would be either a 28 or 35mm.. I have the 21 Zeiss for my film Leica rangefinder and love it.