This filter is a combination between a Neutral Density Grad 0.3 Soft Edge and a Sunset 2 Grad. The Sunset color graduated filter is graduated red, orange and yellow to give a dramatic sunset effect. Graduated NDs are available in Hard Edge or Soft Edge varieties. Soft edge grads have a smooth transition from clear to ND. Hard edge grads have a more defined Hard lined transition and are usually used for longer focal lengths. ND Grads are made in different densities according to the level of light reduction from 1/3 to as much as 4 stops of light. The 0.3 filter reduces light by 1 stop. This 67mm filter is usable with Hitech 67mm holder systems or any 67mm (2.67") holder. The filter is also available in 85mm, 100mm, 150mm and 165mm sizes. Hitech filters are made from the highest quality 1.5mm optical resin.