Density: Above 720 nm, Double-Threaded for Stacking Filters, Ultra-Slim Rim, Premium IR72 Glass. The 58mm Infrared (R72) Lens Filter Plus+ from Urth cuts all visible wavelengths of light so you can capture invisible infrared light for uniquely stunning images. The Infrared Filter Plus+ cuts all wavelengths below 720nm allowing you to capture the otherwise invisible light in the infrared range. This filter is an exciting tool for creative experimentation for outdoor and nature photographers. The Plus+ range features 20-layers of nano-coating providing easier cleaning and better protection against water oil and scratches. These layers also provide a higher maximum light transmission and a more consistent transmission curve for sharper images finer colors and greater depth. This filter is not compatible with cameras that have an IR blocking filter in front of the sensor.