Sony announced the Sony A7 and A7r back in October, the two cameras are some of the first cameras of their size to feature full frame sensors which are very affordable. To show off these cameras, what better way than to record some skydivers in slow motion.
They wanted to make it as though the skydivers were almost floating in the sky. They only had nine takes at a minute each, so essentially only nine minutes to record the whole commercial. All recorded in 4K resolution at 120 fps.