Infrared Lenses (-IR series below) are designed for use with Day/Night cameras. They eliminate focus shift in night mode, especially in the presence of IR lighting.Infrared Lenses (-IR series below) are designed for use with Day/Night cameras. They eliminate focus shift in night mode, especially in the presence of IR lighting.

• 1/2\' CCTV VARIFOCAL, Auto IRIS LENS�10-40mm
• High quality, compact design
• For 1/2\" format camera
• Auto-Iris varifocal lens
• CS-mount
• F/1.2
• Aspherical
• comprised of all glass optics
• come with locking set screws and a durable metal barrel and mount