Hands-on with the K-Lens, a light field lens that captures 3D data for post-capture refocusing

We've seen light field cameras before, such as the Lytro camera, but K-Lens is the first light field interchangeable lens to be available for existing digital still and video cameras. The lens is able to record a grid of images that contain information about the relative distance of different objects in the scene. This information can then be used in post-processing to adjust the focus point in the scene, as well as to easily mask different areas to alter the brightness and colors of different l...