Polaroid Optics IR720 Infrared X-Ray Filter For The Sony Alpha DSLR SLT-A33, A35, A37, A55, A57, A58, A65, A77, A99, A100, A200, A230, A290, A300, A330, A350, A380, A390, A450, A500, A560, A550, A700, A850, A900 & Minolta Maxxum Digital SLR Cameras Which Have Any Of These (18-70mm, 18-55mm, 75-300mm, 55-200mm, 35mm f/1.8, 85mm f/2.8, 50mm, 100mm) Sony Lenses Polaroid IR Filter: This Filter Will Filter Out Most Light Below And Above The Wavelength Of 720 Nanometers (Infrared) Add a Unique, Creative, Fun Filter To Your Arsenal For Spectacular Artistic Effects This Filter Can Help You To See Perfectly Through Sunglasses And Dark, Tinted Car Windows And Sometomes Even In Total Darkness IR Filters Used In Conjunction With An IR Sensitive Camera Can Sometimes See Things Completely Invisible To The Human Eye.