Optimized to match your cameras field of view&lt;br /&gt;&lt;br /&gt;Based on the latest LED technology AXIS T90D20 IR-LED delivers more light where it is needed. It generates longer infrared LED illumination distance minimize light wastage and prevent overexposure of foreground objects. With interchangeable lenses the angle of illumination can be optimized to match your network camera&#39;s field of view. AXIS T90D20 IR-LED Illuminator comes with a pre-mounted 10 diverging lens and it includes diverging lenses of 35 60 and 80 beam angle. Moreover an optional 120 diverging lens is available.