La description

●Apply slow shutter speed under strong sunlight exposure. 
 â—Large aperture is available to creat depth of field easily.   
●Suitable for dynamic screen,waterfalls,streams,waves,etc. 
●Index marks on the edge of filter for exace adjustment.
●Filter housing thickness: *1.0mm,almost the slimest in the current market.
●Refinement texture as Hoya Lens Filter.More beautiful.
●Material:Aliumium Alloy Frame and HD Optical Glass
●High Definition of the Glass                                                      
●Glass thickness: 2.5mm