Optical zoom involves a physical camera lens movement, which changes the apparent closeness of the image subject by increasing the focal length.  It is also referred to as a "true zoom," as it changes a lens' focal length and magnification by physically extending and retracting the lens. This zoomin......

The method of mobile phone remote monitoring camera in LAN

Minrray always adheres to the development concept of quality first and green manufacturing. The production process strictly implements ISO9001 quality system and ISO14001 environmental management system standards.（PTZ camera