Premium Soft GND 0.6 Long GND 150x170mm General GND Filter (Half ND Filter) typically has a dimming effect on half of the filter, and when it comes to half of the density effect, the end is stronger and thinner as it is centered. In this long version, 40mm from the top of the filter rectangle short side is a gradation of 90mm at the maximum ND of 4, 40-130mm, and a 40mm width of 130-170mm. Not only can it be used alone, but it is also an attractive way to use the switch holder + two half ND pieces with weak effect for shooting in uneven scenes such as mountains. It is also recommended for those who take photos of the sky in portraits.