NEEWER&reg; 72mm 72 mm 850nm 850 nm Infrared IR Pass Filter Size: 72mm. Compatible with Any filter with a 72mm thread. Material: high quality optical glass. Infrared Filter Used for photography with infrared films. Infrared film is also sensitive to ultraviolet rays and the shorter wavelengths of the visible spectrum so it is necessary to filter out all but the infrared rays. IR760 passes only infrared rays above 850nm. Infrared filter often used in crime detection, medical photography, detection of distribution of vegetation, etc. For photographer, this filter can be used with infrared film or digital photography to get interesting artistic and sometimes creative photos.