These cameras are widely used for commercial installations due to its flexibility. It generally offers great performance along with important features including the backlight compensation, lens control output and many more. The distance in monitoring the object is not an issue as it can utilize different lenses suitable to various locations. Installing this security camera is bit complicated that is why it is recommended to hire a professional to do the job. It is ideal for commercial installations. Bullet CamerasThis type of security camera is contained in a bullet shaped housing. Most bullet cameras are sealed and weatherproof, yet cannot use different lenses. The great advantage of this camera is its integrated designs and small size that also has infrared LED built in. This infrared technology is not visible to human eye. It illuminates viewing area to ensure monitoring even in complete darkness. However, it works on limited distance up to 50ft.