NANO COATING IR GND FILTERS
Cameras cannot expose the details of extremely low light and dark scenes at the same time. Graduated Neutral Density Filters are typically distinguished by the type of transition that exists between the transparent and dark areas of the filter. For this reason, we can identify four families of GNDs.
the dark area that fades away the more you move from the line of
separation to the upper border of the filter. Basically, they were
invented to better manage sunrises and sunsets, where the light is
more intense on the horizon line (middle).
change from light to dark more gradually) and are therefore
used when the transition between light and dark areas is not so
clear. A classic example is a shot in a mountainous area.
obvious where one begins and the other ends) between the
transparent and dark areas. They are therefore used when the
separation between the bright and dark areas of your scene is very
defined, such as the horizon at sea.
areas of an image, such as bright skies, while allowing for a normal,
unaffected exposure in the other regions of the image. It is particularly
useful for images that feature buildings, mountains and other small
elements that protrude into the skyline.