Green = Center; Lila = Extended Center; Orange = Borders
The MTF charts indicate the sharpness in lines per picture height. They are given for the center of the frame (up to 25% from the center of the picture), an extended center (up to 66% from the center of the image) and around the edges of the picture (more than 66% away from the center). I have set the MTF-limit at 30% contrast. Higher bars indicate higher resolution.
All values are based on RAW shots of test charts that were developed to JPGs without applying any sharpening or lens correction in Capture One 7.0.2. Some sample images are available in the download area below. All MTF and CA values are averages from about 25 to 50 individual measuring points.
The Canon was always set to ISO 100 and the Fuji ISO 200.
Due to technical variabilities, the MTF values shown here are not directly comparable to those of other test sites or magazines.
The image scale was approximately at the Canon 1:8 and around 1:13 at the Fuji. This is significantly lower than the standard value in ISO 12233. The two Canon lenses are macro lenses and should have no problem. But I suspect that the Fuji 18-55 would perform even better with a smaller scale, in particular at the wide angle end of the zoom range.
When comparing apertures, the crop factor has to be taken into account. For a similar picture effect (depth of field) the Fuji's aperture must be selected about one stop lower that that of the Canon. For example, you can compare f/4 with the X-E1 to f/5,6 on the EOS 5D.
[Update] In the meantime, I have compared various RAW converter. I found that Capture One 7.0.2 and Raw Photo Processor (RPP) 4.7.0 give approximately the same resolution values. Lightroom 4 shows about 10 to 15% higher resolution while the RAW File Converter 3.2.12 by SilkyPix has about 10% lower values. In all cases, the sharpening was turned off completely.