
Originally Posted by
John Chardine
Because of the anti-aliasing filter in front of digital camera sensors, the RAW image out of the camera is naturally a little blurred. The strength of this filter varies between camera bodies and is inversely related to sensor-site size. In my experience the 50D has a fairly strong filter; in my 5D mkI the filter is weak and images are very sharp out of the body. For this reason, at the very least, some post-processing in the form of sharpening of digital images is usually required.
Perhaps understanding this one fact may move your friend in the direction of doing some post-processing?