I found that the Nikon 70-200 at 70mm is sharper than Canon EF 135/2.0L from www.photozone.de . How can it be??? Zoom lens is sharper than the Canon famous PRIME lens? Would you like tell me why? I am going to buy the EF 70-200/2.8L IS these days. But I am also thinking to buy the Nikon camera and the 70-200/2.8. Thanks a lot.