canon Patent: Multi Layer AF Sensor# PhotoGear - 摄影器材
y*b
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http://www.canonrumors.com/2015/02/patent-multi-layer-af-sensor
"Another autofocus related patent has appeared from Canon. This time in the
form of a foveon style multilayer AF sensor."
"Another autofocus related patent has appeared from Canon. This time in the
form of a foveon style multilayer AF sensor."