This is a set of 3
ND filters: 0.3, 0.6 and 0.9 densities.
NDs are made in different grades according to the level of light reduction.
The standard grades available for neutral density filters are 0.3, 0.6, 0.9 and 1.2 which equate to 1, 2, 3 and 4 stops of light reduction. Heavier densities can be manufactured to order - please
contact us.