For some time I am working intensively with the landscape photography and initially got me Hitech filters that quite good also did their service. However, but an increasingly unpleasant color shift in the magenta area pointed straight at higher filter strengths. When Lee filter which is not an issue, as well as the transition is a little softer and more comfortable. Sure, the price is only once a bit of a shock, but who seriously deals with the topic Graduated Filter, sooner or later will "hang" at Lee. The attached picture was taken 10x gray filter with a Canon 5D III with a Canon 16-36mm lens, the Lee Soft Edge 0.9 and a Hoya. As you can see, it also comes at this already extreme right combination to any color shift!