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Question:

What's the difference between a 6mm camera and a 3mm camera

What's the difference between a 6mm camera and a 3mm camera

Answer:

3. The smaller the lens, the closer it is to monitor the distance, and the larger the lens is, the more effective it is to monitor the distance.
2. The smaller the lens, the larger the Angle of the lens.
1, 6mm and 3mm are the size of the lens;

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