The Baader UV-IR Cut/L Filter is a must for all digital imaging with DSLR cameras, CCD cameras, and modified webcams. It removes the unwanted UV and IR wavelengths from your images by blocking UV below 400 nm and IR above 680 nm. This UV-IR Cut filter is 36mm unmounted
Due to their extremely high optical quality, these filters may be stacked and used far in front of the focal plane (necessary for imaging uses). Like the Baader Planetarium Contrast-Booster, the UV / IR Cut filter uses the very latest coating technology to deliver the finest filtration quality, and lifetime durability.