Pelcos 13M series megapixel varifocal lenses are a class of lenses specially designed to provide optimal results when used in cameras with megapixel sensors. These lenses enable megapixel cameras to realize the high resolutions that standard lenses cannot deliver, with a resolving power of up to 100 lines per millimeter. These lenses provide excellent image quality at both the center and at the corner of the image. The 13M series offers versatility and flexibility in a compact package. Each auto iris lens covers a specific range of focal lengths, so you can adjust the lens to achieve the exact field of view instead of "almost the right view". Appropriate for indoor and outdoor lighting situations, the 13M series lenses will fit all 1/3-inch CS-mount cameras requiring DC drive auto iris lenses. A factory-installed square 4-pin plug is standard for ease of installation. Designed especially for low-light capability, Pelcos 13M series lenses are extremely fast. These lenses provide excellent performance across a wide range of lighting conditions. The 13M series also provides excellent day/night performance in Pelco Sarix cameras that are capable of this function, which includes operation with IR lighting and visible lighting. The 13M series lenses have a slip mechanism that allows it to be easily adjusted and oriented inside enclosures, domes, and so forth. In addition, the metal mount makes for a robust and secure attachment to cameras.