Profile: Singh-Ray Corp. is a manufacturer of filters. Our product line includes ari-N-duo polarizing variable neutral density, vari-ND variable neutral density filter, Mor-Slo 5-stop neutral, graduated ND, reverse ND Grads, gold-N-Blue polarizer, LB Warming polarizer and I-ray infrared filter. Our new Vari-ND filter features a long exposure easier, makes selective focus easier and provides better close-up flash control. These are available now in 77mm standard and thin-mount rings, and 82mm standard rings. Our I-ray infrared filter captures more of "the invisible light beyond". It transmits over 90% of near-infrared light between 700 & 1100 nanometers while blocking virtually all visible and UV light.