The Schneider Optics 68-121144 4x4 True-Cut 680 IR Filter is designed to remove the IR spectrum from the light path, resulting in more vibrant colors and true blacks from both CCD and CMOS imagers. The True-Cut IR filter blocks the IR light mere nanometers from the visible spectrum, eliminating IR pollution from the image.
It is similar to the True-Cut 750, except that it blocks light at the very edge of the visible spectrum for certain high definition cameras that require extra IR blocking to achieve true black tones.
This filter maintains a high MTF (Modulation Transfer Function) in the visible spectrum and its coating meets or exceeds military standards for durability, allowing it to be easily cleaned. The filter is manufactured from crystal-clear, water-white optical glass that is diamond cut, precision ground, and polished to the most exacting tolerances.