For example, a video camera may claim to have as many as 600 lines of resolution and still be a poor quality camera due to poor workmanship, cheap parts or something as simple as a poor quality lens. Obviously, resolution is important and should be considered when purchasing any video surveillance camera equipment, but should not be a used as a quality gauge. The lower the number, the less light it will take to reproduce a clear image. A camera that sees down to .1 has the ability to see an image in let's say, a well lit parking lot. A rating of .05, the ability to clearly view an image in a dimly lit area at night.
Lenses come in many different powers and formats.
Most CCD Cameras today utilize an automatic iris. There are two benefits here. There is one other option to consider when ordering lenses. It is the most important. Wide angle lenses normally used to view a room no bigger than 30ft.