Roger -- I'm kind of at a loss as to why ysnyone would buy an FX camera and then turn it into a DX instrument. That gives no more "reach." It simply does the cropping of the full image for you. And if you accidentally crop something out of the DX frame that you wanted -- it's gone forever. The only possible benefit I see is a smaller file, faster downloads, less storage space... But that is surrendering the capability you paid for. Just random thoughts.