Brian videotapes all trainees at 30 frames per second with a Casio High-Speed Exilim EX-FC100 camera. He believes, as do I, that you can learn more in one hour of video analysis than you can in a year of self-correction without video. Casio claims it can record slow-motion videos at up to 1,000 frames per second.
Source: Tim Ferriss, The 4-Hour Body – Ultraendurance I
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Casio Exilim EX-FC100 Digital Camera – White EX-FC100WEDBA Digital Cameras