Physics, that's why. The sensor in the standard DSLR is fairly large and thick and has a fairly large aperture to let enough light hit it. The sensor in the iPh

Physics, that's why. The sensor in the standard DSLR is fairly large and thick and has a fairly large aperture to let enough light hit it. The sensor in the iPhone is about the size of a pinky nail. You cannot get the megapixels the RED has without larger sensors.