Zoom on specific area

The camera you need for this job produces a view of a specific area. It is a security camera that zooms on a specific area to get a more detailed picture of an area or activity. To produce this kind of detailed picture you need to adjust the lens when you setup the camera. Cameras that have the ability to zoom in and out are featured with Vari Focal lens (these cameras can be identified by the feature Vari-Focal or VF at the end of the model number).  These types of lenses will specify the amount of Vari Focal in two numbers like 4-9mm or 5-50mm. To identify the stronger zoom, look at the second number (which is larger.