I have been using Singh-Ray filters for years and personally consider them to be the best. The quality of Singh-Ray filters is exceeded only by the company’s superlative customer service.
Most recently, Howard solved a pesky issue I was having with the Infrared I-830 and went above and beyond normal good service for a very favorable outcome. I consider myself an unofficial ambassador for Singh-Ray products but especially for their outstanding customer service.
Frank Cortese