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A comment on Show HN: Is It Snappy? – Measure latency with your iPhone's 240 Hz camera. Parent comment

Re:Show HN: Is It Snappy? – Measure latency with your iPhone... by jurie on Monday April 03, 2017 @07:43PM (#14028294)
The cell phone camera is a great way to test whether a multimode fiber optic cable is connected at the far end, too.
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