Help balance exposure
and/or compensate for the limited
dynamic range of digital cameras.
Add two stops of ND to control
overexposure of the sky or exposure
of a scene from side to side. For
example, a scene looking down a
city street with buildings on one
side in direct sunlight and shaded
buildings on the other. The same
technique can be applied indoors
when a window or doorway blows
out. For more of a film look, the
cinematographer can decrease depth
of field by shooting wide open.
The ND combo combines a solid
neutral density filter (0.3, 0.6, 0.9,
1.2) with a soft edge 0.6 ND. In all
densities, the additional soft edge is
two stops more than the lower half
of the filter.