A new camera from startup company Lytro lets you pick which part of the photograph to focus on after you've already shot it. It also enables photos to be viewed in 3D. Explains Technology Review of the two-button camera, "The light sensor is what makes Lytro's product different from any other consumer camera. In a conventional camera, the sensor's pixels come in three versions that record red, green, and blue light to build a full-color image. On Lytro's 'lightfield' sensor, pixels are more discriminating. As well as being specialized to red, green, or blue, each detects only light coming from a particular angle."

The cameras start at $399 and are now shipping. Read more here.