June 22, 2011 Lytro Camera Lets You Focus Photos After You Take Them (try it on the photo here from WIRED) Edit Delete Tags Autopost http://www.wired.com/gadgetlab/2011/06/lytro-camera-lets-you-focus-photos-aft... Quite a novel idea.
May 31, 2011 very good explanation for Canon DSLR users: Back-Button Auto Focus Edit Delete Tags Autopost via learn.usa.canon.com