Marshall - 3.20 mmf/2 - Fixed Lens for CS MountEngineered for security professionals and discerning photographers alike, the Marshall 3. 20 mm f 2 fixed lens for CS mount cameras delivers crisp, reliable imaging in a compact, plugandplay package. This lens is purposebuilt to slot into standard CSmount surveillance cameras, offering a fast aperture, compact dimensions, and a fixed focal length that ensures consistent framing across deployments. Its 3. 20 mm focal length provides a broad field of