<ul><li>Infrared filters, sometimes called infrared filters or endothermic filters, are designed to allow mid-infrared wavelengths in the infrared while blocking visible light. They are commonly used in devices with bright incandescent bulbs (such as slides and overhead projectors) to prevent unnecessary heating.</li><li>Due to the high sensitivity of many camera sensors to near-infrared light, there are also filters for solid-state (CCD or CMOS) cameras to allow infrared. These filters usually have a blue tint because they sometimes block some light from shorter visible and ultraviolet wavelengths as well.</li><li>Digital cameras are often equipped with infrared blocking filters to prevent unnatural images. Infrared transmission (through) filters, or removal factory infrared blocking filters, are commonly used in infrared photography to pass infrared light and block visible and ultraviolet light. This filter appears black to the eye, but is transparent when viewed with infrared sensitive equipment.</li><li>The adjustable infrared filter is a compact all-in-one variable wavelength filter that can be adjusted by simply turning the wrist. The index mark on the filter allows you to know exactly the number of wavelengths at a glance. No matter what wavelength you use, it will provide you with clear and accurate shooting results. It makes you free</li><li>Create different wavelengths without having to carry a bunch of filters to shoot. With just one filter, you can freely provide a range from 530nm to 750nm.</li></ul><br><br>

PtaTt Adjustable Infrared X-ray Lens Filter 530/590/630/680/720/750 nm for 46 49 52 55 58 62 67 72 77 82 mm Digital SLR Cameras (Size : 72mm), PtaTt7151