Canon HG21 is a successor of HG10 as it was built around similar functionality with additional output mode, extra storage and some more. It comes with 120 GB storage. It still carries the same five recording mode as HG10, from the sharpest resolution with MXP at 1920 x 1080 (equivalent to 24 Mbps), ...
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The Canon HD Camera System is the unique combination of a Canon HD Video Lens with 12x optical zoom, a 3.3 MP Canon Full HD CMOS sensor, and the powerful DIGIC DV II processor. All of these components are made exclusively by Canon and optimised to work perfectly together – for superb HD quality.