The Relationship Between Focal Length and Monitor Distance

please refer to the table as below

Focal Length	Field of view (e.g)	Recommend monitor distance
2.8mm	98.5°	About 3 meters
4mm	79°	About 6 meters
6mm	49°	About 10 meters
8mm	40°	About 20 meters
12mm	23°	About 30 meters
16mm	19.2°	About 50 meters
25mm	12.4°	About 80 meters
※Field of view angle varies from different model, refer to the official website for accurate parameter

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