At Superior CCTV, it is recommended that fixed focal length lenses should be used particularly in instances where accurate image quality is required. Compared to variable focal length lenses, the fixed focal length lenses have less optical distortions, and improved high contrast. Mechanically there is also less that can go wrong and they also can be designed in a smaller package, which is useful when installing covert equipment. Finally, performance in fixed focal length lenses is typically better than performance in variable focal length lenses and these lenses are also cheaper and easier to install because of the elements inside of them. A Fixed Focal Length Lens allows for excellent image quality and high dependability of the CCTV system when selected.