Today I bought some flowers to make a few macro shots of them. And once again I was disappointed by my EF 100mm Macro lens. When I come really close to the object it gets overly soft. I really miss the sharpness in this lense at short distances. Of course the Dof is rather shallow when you are near life-size magnification, but there is not even the tiniest dot you could call sharp. I am not sure if it is really a problem of the lense or rather that of the lense combined with my 400D. I just saw some sample pictures of that lense mounted on a 10D, which were all tack sharp. Anyone here who has experiences with this combo: Canon EF 100mm f/2.8 USM Macro on a 400D? Or any idea why I just don`t get sharp pics with this lense?