Light Field Datasets Now you can convert your medium format digital/film camera into a 4D light field camera. And that too in 5 minutes costing less than 5 dollars.
Front and back of a Lytro , the first consumer light-field camera, showing the front lens and LCD touchscreen. A light-field camera , also called a plenoptic camera , is a camera that uses a microlens array to capture 4D light field information about a scene. Such light field information can be used to improve the solution of computer graphics and vision-related problems.
"Lytro will introduce the first light field camera that allows consumers to instantly capture interactive, living pictures and then focus them AFTER they are taken."