This works by having the various sensor elements placed in an order such that the electronic components such as electric wires are placed behind the sensor, and therefore do not interfere with the incoming light. This makes sense, but traditionally, putting all those components in front of the light-sensing elements made those chips much easier to build.
Among the new features, Sony has also improved the ergonomics of the camera by adding a tilt LCD display (up and down), along with an accessory shoe. Finally, WiFi connectivity has been added to allow for photos download/sharing with smart devices or a home network.
Sony has created this camera mainly for two types of users: 1/ those who already have a DSLR but would like a radically more compact secondary camera. 2/ users who already enjoy a compact camera but who want a higher quality image, especially when it comes to noise reduction in low-light photography.
To wrap up with the new features, the Sony RX100M2 also gets a tilt display for improved comfort when shooting at odd angles, a “Step Zoom” that switches between 28,35,50,70 and 100mm, 1080/24p video recording to mimic a “film” framerate and a shoe accessory slot that can receive Flashes, electronic viewfinders, microphones and more.