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What are the recommended camera placements to capture the most relevant shots?
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Camera formats are measured in inches: most surveillance cameras fall between 1/4" and 1". This refers to the usable image size created inside the camera. For most security systems, a small size is fine - 1/4" or 1/3" surveillance cameras dominate CCTV sales. Larger formats do not necessarily result in better images, but can be advantageous in dimly lit situations since they are able to gather more light.
The varifocal lens is ideal in situations where the security camera surveys a distant point. One can adjust the zoom and focus of these lenses, either manually or automatically. This is sometimes referred to as "manual zoom" lens.
Dome cameras are commonly used when there is a need to mount cameras to the ceiling. The benefit of the dome camera is that you can't see where the internal camera is facing and, as such, provides an illusion of increased surveillance. Domes are less obtrusive and generally accepted in any environment. The cables for a dome cameras are generally fed through a small hole in the wall or ceiling, so no wires are visible after installation.
Bullet cameras (commonly call tube cameras or lipstick cameras) are smaller and less noticeable, visually directional in their viewing and they're weather resistant for outdoor applications.
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