This is a high-quality focal lens from Computar, perfect for security cameras. With a maximum aperture of f/1.3 and a focus type of auto, this lens is sure to capture clear and crisp footage. The mount is CS and the focal length ranges from 5-50mm. The lens is made for security cameras and will fit perfectly without any issues. It is a perfect choice for anyone looking to upgrade their security camera's quality. The brand is well-known and respected in the industry, and the model is TG10Z0513FCS-3, making it easy to identify and purchase. This item is new, but was a part of security overstock. It may have remnants of a label or some sharpie marks. FREE SHIPPING to the continental U.S. inlet please.