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COP USA L3.5-8MM 1/3" 3.5mm - 8mm Varifocal C/CS Mount CCTV Lens W/ Manual Iris
The COP-USA L3.5-8MM is a quality cctv lens that boasts a varifocal 3.5mm - 8mm 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 L3.5-8MM.