From my experience the B&W brand is one of the best. Tiffens will do. Just look for a good name brand and find the best price on that brand. I keep a Tiffen on the camera almost all the time and then use a Cokin when I'm useing the Cokin filters! I bought the Tiffen used from B&H Photovideo for about 16 dollars U.S. It looked and has performed like new.