One of the hallmarks of Canon cameras is Dual Pixel AF. First introduced on DSLRs at a time when Live View mode was known for faltering autofocus, the technology turns each pixel into two focusing sensors. But, can Canon make the autofocus system that ranks among the best, if not the best, even better? A technology called Quad Pixel Autofocus could be Canon’s next big move. Recent patents have fueled rumors about the technology. But, just this week Canon has shared that it was the only company to rank among the top five for the number of U.S. patents filed for 36 years in a row. With 3,022 patents filed in the U.S. last year, there are bound to be some ideas that never really lead anywhere. Will Quad Pixel AF be one of them?