Sorry that is silly, you can't reduce the size of a FF dSLR too much because you have to put in a 35mm mirror. Look at the new FF camera. Not exactly lightweight are they? http://camerasize.com/compare/#378,380 Nikon D600 850g and the Canon 6D 770g. Lightest dSLR I believe is 505g. Mirror and focal plane shutter put pay to reducing the weight and bulk of any dSLR. So there is a limit. But with a CSC and a reduced sensor http://camerasize.com/compare/#378,392 Now of course the CSC does not match the performance of the D600 or 6D. But as a consumer product it appeals because it is smaller and lighter. Doing a FF dSLR is actually the wrong approach for the consumer market. Like offering a desktop PC to buyers of Iphones. Much better to design a FF mirrorless camera with a high spec EVF. http://camerasize.com/compare/#378,376 Take the blooming mirror out and look at how tight the design can be. Since phase detect was put into the sensor, mirrors are for the scrape heap big time.