ND filter
A Neutral Density
filter or ND filter is a "grey" filter, it appears gray and reduces the
amount of light reaching the film or sensor, but does not have an effect
on color balance.
The purpose of standard photographic neutral density filter is to allow
the photographer greater flexibility to change the aperture or exposure
time, allowing for more control, particularly in extreme circumstances
such as on a very bright day.
This filter can be used to prevent strong overexposure even when using a
slow shutter speed. It's perfect for shooting in heavily-lit settings or
for extended exposures. For example, when you use a slow shutter speed to
capture a bright moving object, such as a waterfall, this filter is your
best choice. See the pictures below for comparative shots of a waterfall
taken both with and without the use of this filter. The ND Filter we offer
is double thread with 2×, 4× and 8×(ND2 ND4 ND8) to indicate the amount of
light a ND filter can reduce. Different neutral densities have different
effects. You can use the filter individually or in any combination to meet
your demand.
ND2 filter can reduce light transmission by one
stop.
ND4 filter can reduce light transmission by two
stops.
ND8 filter can reduce light transmission by
three stops.
CPL filter
What does CPL filter do?
Firstly, it can darken blue skies turning them a deep, rich blue.
It also could remove reflections in water; therefore, you can see the
detail in the water or river bottom during shooting a river scene. It is
also good with foliage, making leaves and less shiny.
It removes reflections from non-metallic surfaces:
Skies
Color Enhancement
Water and
reflective surfaces
Light absorption
