ZWO 1.25″ IR UV CUT filter is suitable for colour cameras with AR protect window. The ZWO IR-Cut Filter blocks infrared light from reaching the sensor of your CCD or CMOS camera or your expensive H-alpha filter. When imaging, the addition of this simple and inexpensive accessory will result in sharper images, and when doing solar work, the IR Cut Filter will protect your H-alpha filter from the damaging effects of infrared radiation. Infrared or IR light is invisible to the human eye. Most telescopes are not designed to focus IR light which doesn’t matter when you are using your telescope visually. However, when you add a camera to the mix, its a different story! Unlike the human eye, a silicon sensor is very sensitive to light in the infrared portion of the spectrum, and that is a problem because the infrared component of your images will be out of focus and blurry. That means your nice, sharp visual light image is degraded by the addition of the infrared layer. This problem can easily be solved by blocking the infrared light, and the ZWO IR Cut-Off, will do just that. The ZWO IR-Cut filter is housed in a 1.25” cell, and has internal threads so that you can stack filters together. The filter comes with a protective plastic case. UV IR Bandwidth Graph
