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Not focused at laser spot
Cure:
1. Before measure, tap the laser spot so that it can be enclosed by the green "Focus Frame".
2. At the meantime, the camera will adjust focus of the object. Make sure the object you are measuring is clearly in focus.
3. Then tap measure.
Note:
Always make sure to focus and enclose the laser spot in the "Focus Frame" before "Measure", in both calibration process AND measurement processes.