Analog cameras come in a variety of types and sizes. In certain circumstances there are benefits to choosing an analog camera.
Lower cost – An analog system is more affordable and usually is more than sufficient for remote monitoring.
Greater flexibility of design – Analog cameras often come in a larger variety of designs such as mini covert cameras to large PTZ models. If you have unique surveillance needs you may find it easier to find the style of camera you need in an analog model.
Compatibility – It is much easier to mix and match cameras and brands if you use analog versions. Allowing for easier equipment integration to existing systems.