Hi João,
We realy have monuments with a great stone work in Portugal, nice shot!
I noticed that the shot was made at 1/800 f9.9. Small sensor cameras dont like high fstops, high apertures will result in image degradation due to diffraction problems of the sensor. It seems that the digital sensors have a better response with parallel rays of light. :? Angular light and photo lens are non-separable, we dont realy have this kind of problems with film cameras...