Entry Level SLR and Enthusiast SLR Cameras - Image Quality

Many new photographers want to know the differences in image quality, between entry-level DSLR cameras and enthusiast SLR cameras. When you hear the phrase 'entry-level SLR cameras', it doesn't mean anyway that the image quality is low or poor. In this discussion, I want to separate this post between a full frame SLR cameras and cropped frame ASP-C SLR cameras. When you compare an entry-level