My daughter has a Canon Rebel XT and recently purchased a Canon 50mm F1.8 and a Canon 85mm F1.8 lens for this camera. She had two reasons for wanting these lenses: (a) to take pictures when ambient light levels are low without having to use flash and (b) to use the shallow depth of field of these lenses at large apertures to separate the subject from the background. The two lenses are quite sharp but unfortunately, 64% of the images taken at a wide aperture (F2) are out of focus regardless of the focusing mode used. We took a series of photos of a stationary object with the camera/lens mounted on a tripod, using the self timer to eliminate vibration caused by mirror slap. We photographed the subject using Manual Focus override, AI mode, and One-Shot mode. The overall result was that 64% of the time, the camera focused in front of the subject far enough in front to create an unacceptably blurry picture of the subject. (To be precise, only 20% of the images were sharply focused in AI mode, only 40% in One-shot mode, and only 50% in the manual tweaking mode) This is very annoying. Actually its more than annoying, its downright unsatisfactory. The problem does not occur with the standard 18-55mm zoom kit lens because the maximum lens opening is only F3.5-F5.6 (greater depth of field) with the kit lens. which takes amazingly sharp pictures. The problem is apparently caused by the camera's sensor and/or mirror alignment or positioning, and could presumably be corrected by Canon for a "mere" $210. But is it worthwhile to have this camera repaired, or should my daughter get an upgraded Canon camera with more megapixels and the stabilized kit zoom lens? Also, what is the likelihood that Canon would fix the camera free, since this appears (maybe it is, maybe it isn't) similar to the problem that prompted the technical advisory and free repair for EOS-1D cameras which experienced focus tracking problems?