The Urth 40.5mm Infrared R72 Lens Filter Plus+ is designed for professional infrared photography applications. This specialized filter blocks all visible light wavelengths below 720 nm, allowing only infrared light to reach the camera sensor. Made from high-quality German SCHOTT glass, the filter features 20 layers of nanocoating technology that provides enhanced protection against water, oil, and scratches while also facilitating easier cleaning maintenance. The advanced coating system ensures high maximum light transmission with consistent transmission properties, resulting in sharp image quality and accurate color reproduction. The ultra-slim edge design prevents vignetting when mounted on compatible lenses, while the robust magnalium construction offers long-term reliability. The double-threaded mount allows for filter stacking or the attachment of screw-in lens caps. This infrared filter is specifically designed for creative photography applications, particularly suitable for landscape and nature photography, where infrared light transformation creates striking visual effects. The 40.5mm thread diameter ensures compatibility with corresponding lens sizes. Note that optimal performance requires cameras without built-in infrared cut filters in front of the sensor. The filter enables photographers to explore the infrared spectrum and capture light wavelengths beyond human perception for unique artistic expression.