http://www.time4.com/time4/microsites/popsci/howitworks/lightfield_camera. Specs are already circulating for a 22-megapixel cellphone camera, and within a few years 300-megapixel sensors will be no problem. But lenses, ground from glass, can?t focus light sharply enough to take advantage of this windfall. In other words, at some point you simply can?t capture any more detail. Engineers at Adobe Systems, pioneers of Photoshop, see this limitation as an opportunity to rethink photography and put those megapixels to work. Their prototype ?light field? lens attaches to a normal digital camera to shoot the same image from dozens of focal points at once. Later, software combines all the images, so you can refocus your photos after they?ve been shot. A system from Stanford University researchers achieves a similar effect by placing a lens like this directly over the sensor. The article is about new lens technology being developed by Adobe, but the snippet about 300-megapixel sensors is what caught my attention.