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Stated another way, the margin of the field of view is limited by physical features of the lens assembly 704, rather than by the camera opening or transparent area 712 of the front cover plate 708. Such a substantially large camera opening or transparent area 712 enables a substantially wide angle view for the doorbell camera 106 when a wide angle lens assembly is applied. In some implementations, the front cover plate 708 includes a substantially opaque area that is distinct from the substantially transparent area of the camera opening 712. An interior surface of the substantially opaque area is painted with dark color ink e. g. , black ink.home alarm security systems
You can use any ip based network camera and use either a 2. 4GHz or 5. 8GHz WiFi access point such one of the following:WiFi signals just like your home router have better penetration through obstructions without loss of video signal. That's why you can have your router on the ground floor and still watch Youtube on the second floor. Of course, the stronger the transmitter inside the router or AP, the farther it can transmit the signal. Since video sent over WiFi is a data signal, as long as there is signal penetration you will see a clear picture without interference lines.