As far as the photo distortion in color. Its true that the CCD is the "retina" of the camera, like the film in a traditional camera. However that's not where the "guessing" or distortion happens. The distortion happens in the conversion to digital format. Like as N-E-Fett said, if the file goes to JPEG, you will get "guessing" as that is the very nature of JPEG compression. it averages all the surrounding pixel colors, and drops out the ones within a certain tolerance. That how it gets the file size reduction-by throwing out information. However, if your photos are shot in RAW mode, your file will include ALL the information the CCD sees. the conversion process to TIFF is a lossless format. I know this is a bit off topic, but relavent to the discussion at large. 
