What is the difference between high-definition network ball camera, fastball camera and bolt machine?

The main difference is the shield. In addition, fastball cameras are generally equipped with integrated automatic zoom and focus lenses, while bolt machines and hemispheres are mostly equipped with fixed focus or manual focus lenses. Generally, the pixels of high-definition network cameras are mostly between 720p and 1080p (that is, between 1.3 million pixels and 2 million pixels), and there are also 3 million and 5 million high-definition network cameras.