... creat depth of field easily. 4.Suitable for dynamic screen,waterfalls,streams,waves,etc. 5.Index ... marks on the edge of filter for exace adjustment.6.Filter housing thickness: ... 11.0mm,almost the slimest in the current market.7.Refinement texture as Hoya Lens ... Available size:49mm ,52mm,55mm,62mm,67mm,72mm,77mm,82mm