The bottom line is that if you are looking at inspection cameras that are still measured in TV Lines, you are looking at equipment of yesteryear.
Today people choose to go with HD products (which are measured in megapixels) rather than analog standard definition cameras (measured in TV Lines). 700 TVL cameras paired with a 960H DVR will allow you to identify an obstruction up to 3 meters from the camera. HD cameras will allow you to identify an obstruction at 15 meters or further (depending on the model).
The quality of HD is now much more affordable and it makes little sense to consider analog cameras for new inspections.
Another factor to consider is Efficiency. Since analog has a slower shutter speed, one can only conduct their inspection at a predetermined speed, so as not to affect the picture quality even further. HD’s shutter speed is far greater and therefore allows for the inspection to be conducted at a concise faster pace allowing for quicker inspections and time saving.
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