2X graduated neutral density filter reduces the light 1 stop
Reviewed by 1 customers
Heliopan light filters are advertised as being constructed using Schott glass (Zeiss). However, when I received this filter its packaging indicated it was made of "Optical-resin". I later learned that not all of Heliopan's light filters are made using glass; graduated ND, special effect types like fog or Zeiss Softars are made from acrylic. Since I was seeking the durability of a glass filter, I returned the product without issue.