I don't really see your point. The XA has that semi-wide angle 35mm lens of fairly modest specs (albeit for its era, very clever construction); it doesn't require super-accurate focusing to begin with, the reason being the large depth of field that will provide sufficiently sharp images despite any focusing anomalies. Surely you've seen this in your own photos with this camera, as we all have? If you shoot at a shallow apeture and wonder why there is a short zone of acceptable sharpness, that is not the camera's discrepeancy, but your choice of aperture. It's not an SLR where depth of field is scrutinised by direct coupling between the lens Av control and the viewfinder.