The Schneider Optics Storm Blue Filter, provides a rich aqua blue color.
As a solid color it
can be used to add gray green color to an ocean and sky for a stormy effect.
Storm Blue graduated filters can be used to enhance a blue of sky, or when used
inverted they can enhance the color of water or cool a snow covered mountain
Note that the filter color MIXES with the sky or water color to
create the final color.
This filter is available in strengths of 1, 2, and 3. These strengths achieve
a subtle, moderate, or bold effect.
Schneider makes both soft-edge(SE) and hard-edge(HE) Graduated Color filters.
Typically, soft-edge filters are used with wide to medium-angle lenses because
these lenses have greater depth of field. Hard-edge filters are preferred for
use with telephoto lenses or for bold transitions.