Box HD-SDI CCTV cameras allow installers to use attach different size lenses to the camera to accommodate the angle of view / zoom level to provide surveillance to areas located at different distances. The HD-BX7 HD-SDI security cameras from CCTV Camera Pros currently has two lens options available: 2.8-12mm and 5-50mm. Click here to view 1080p video footage captured by this camera using these two lens sizes at different settings to see the different. The HD-BX7 can also be used for indoor and outdoor surveillance applications. A plastic swivel mount allows the camera to be mounted indoors to a wall or ceiling. An outdoor / weatherproof housing must be used when mounting this camera outdoors, and an outdoor housing with a heater and fan is available when this camera is used in extremely cold or hot weather environments.