Canon reinvents video focusing with the fiercely fast EOS 70D@ 2013/07/02
At the core of the 70D's modifications is what Canon's calling Dual Pixel CMOS AF. Essentially, the sensor includes twice the number of pixels in an (very successful) attempt to improve focusing. There are 40.3 million photodiodes on the sensor, and when they're all working together, "it's like 20 million people tracking the focus with both eyes," as Canon explains. The result is camcorder-like focusing for both stills and video, when you're shooting in live view mode. During our test with a pre-production sample, the device performed phenomenally, adjusting focus instantaneously when snapping stills, and quickly but gradually when recording video. Join us after the break for a closer look.