Over the last few years, CCTV cameras have become more sophisticated. Nowadays many of the cameras do not require separate C/CS lens assemblies as the auto iris function has been suplanted by electronic shutter which has become integral with the camera and its unmoving parts. The C/CS mount lens however is not yet gone, as it still provides maximum flexibility by offering variable focal lengths, focus, and is easily changeable. Professional installations generally still require C/CS mount cameras with a good quality lens assembly, whether it is a manual iris, or auto iris. Typically these types of cameras will generate the higher quality video We have many more Rainbow, and Computar cctv lenses than what you see here, and we can get you others as well (usually at great discounted pricing) These are merely a couple of the most popular types. Feel free to give us a call (even on weekends!) to help you determine which lens will work best for you. Auto-Iris Lenses Manual and Fixed Iris Lenses Special Purpose Mini Lenses Pelco Lenses Machine Vision Lenses American Dynamics Lenses Computar Lenses All Security Equipment, Surveillance Equipment and CCTV products come with a minimum 1 year warranty, and in some cases, the manufacturer may extend your CCTV products warranty even further. All prices shown are DELIVERED UPS std Ground, and there are no additional shipping charges unless other shipping arrangements are required. Government, and institutional Purchase orders accepted with prior approval. Please fax your purchase order directly to 231-346-5920, or call 231-932-9550 for details and toll free faxing. Thank you again for visiting cu1.com, your CCTV surveillance and security equipment experts. Please stop in again! Gladly Accepted.