Buy from Amazon.com : http://fave.co/1Cu9iIM
B W 46mm ND 1.8-64X?Neutral Density Filter with Single Coating (106) - 65-1069137
Product Description :
This filter uses our standard BW F-Pro filter mount which has a front accessory thread and is made of brass
Truly Neutral Gray design
Manufactured from Water-White Schott Glass
