That is simply because you only get the full 200Mp in 4:3 aspect ration Mark. If you are only getting 124Mp then that tells me you have selected 200 Mp when photographing in full screen mode. It is an easy mistake to make to be honest, and it puzzled me for a while when it happened to me. Try taking a 200Mp shot in 4:3 aspect ratio and you will see it register as a full 200Mp image in it's description.π