What should I look for in an infrared filter? - Photography Stack Exchange
Infrared Photography - Tutorials - 3) Filters Comparison Here is the comparison of filter wavelengths of the 590, 665 and 720nm. Above 760nm as the 850 and 950nm, it's B&W. | Facebook
40.5mm 720nm+850nm+950nm Infrared Ir Optical Grade Filter For Lens - Mobile Phone Lens - AliExpress