Filter—Hoya R72 Infrared Pass
Graphs are in nanometers. Visible light is approximately 390 - 650 nm (the human eye can see very weakly into the 700-800nm range). Graphs used by permission of Coastal Optical System.
A great source for filters at competitive prices is B&H Photo. Get filters at B&H Photo.
$15 SAVE $35 = 70.0% Luminesque 52mm Circular Polarizer and UV Slim PRO Filter Kit in Lenses: Filters