Nokia Lumia phone running Windows Phone 8? Its time to hit the App store and download the Nokia Refocus app. The app was earlier thought to be reliant on the Pure View Camera tech. But it appears that Nokia has made the App available to all.
How the picture can be refocused is reliant on the apps ability to scan the area, a Focus Sweep while you hold the camera steady. The phone camera and app will then capture multiple images at various focal lengths and combine into one dynamic image which can then be refocused later. Sort of like the Lytro camera.
In other news it looks like the new HTC One (aka M8) will also have this functionality inbuilt.
