Try these Doc
http://www.digitalcamerawarehouse.com.au/prod2749.htm
http://www.mediavision.com.au/
and here's an interesting link on filter brands and uses
http://www.redbubble.com/people/pete...ensity-filters
Try these Doc
http://www.digitalcamerawarehouse.com.au/prod2749.htm
http://www.mediavision.com.au/
and here's an interesting link on filter brands and uses
http://www.redbubble.com/people/pete...ensity-filters