Does the Lytro camera and/or software give the user the ability to assemble an image that is in focus at all distances? Well before the Lytro camera was introduced, I recall reading that plentoptic cameras would allow such capability.  But more recent coverage states that while the Lytro camera produces a data file from which a number of images can be extracted, each image is in focus only at one distance. Can anyone find coverage on this?    