Perhaps this is the most important question. The shutter will determine the cost and reliability of the camera. In the last decade there have been several attempts to prepare the production of a new camera. All attempts were unsuccessful. A reliable and inexpensive shutter is a very difficult problem. You can make a good shutter using ideas that have been implemented in the long history of photographic technology. But such a shutter will be very expensive for relatively small production volumes. And the high price means that the camera will not sell in the millions. We remember that the new camera will have to compete with the multi-million dollar secondary market for cameras. It is necessary to choose which kind of shutter we use.