Industrial Covert Unlimited is in its 20th year of operation. CU1.COM has been up since mid 1999. Great security & CCTV products and people who answer the phone!
Check this out!
COP USA L0550M 1/3" 5mm - 60mm Varifocal C/CS Mount CCTV Lens W/ Manual Iris
The COP-USA L0550M is a quality cctv lens that boasts a varifocal 5mm - 60mm focal length for a variety of viewing angles. This CS mount lens also has a great f stop of 1.4 for lower light situations, and on top of that it has a manual adjustable iris.
So if you're looking for an inexpensive and quality lens for your C/CS mount camera, then look no further than the COP USA L0550M.