Amazon.com : 6 in 1 Infrared IR Pass X-Ray Lens Filter, Adjustable 530nm to 750nm Screw-in Filter for Canon Nikon Sony Panasonic Fuji Kodak DSLR Camera (52mm) : Electronics
52mm IR850 Infrared Filter Ir Filter 52 MM Ir 850 dHD Digital Pass Filter | eBay
Ice HB720 Infrared Filter (52mm) ICE-720-52 B&H Photo Video