A&R Professional Metal 40.5mm Infrared 720 IR720 For Nikon 1 V1 10mm Olympus Infra Red A&R dHD 40.5mm - IR720 Infrared Filter - for ANY DSLR Camera, SLR Camera, Or Lens with a 40.5MM Filter Thread Use 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. IR720 passes only infrared rays above 720nm. 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. dHD 40.5mm Infrared Filter, Digital High Definition. Low Profile Filter Ring, High Index Optical Glass, Maximum Light Transmission Reliable Service, Same Day Shipping