The PROND200 has a 7 2/3-stop light reduction equal to a ND optical density of approx. 2.1.
The ACCU-ND technology in the Hoya PROND filters yields a truly
neutral color balance that will not add any noticeable color-cast to
your images. The Hoya PROND
series is aimed at the still photography and
HDSLR video markets. The series provides 10 filters from one stop to 10
stop light reduction.
The Metallic ACCU-ND coating on the PROND filters do not color shift
as you move from one density to the next, a common problem with other
series of neutral density
filters. Now you can set your white balance
once and have the same color balance even if you need to change filters
due to changes in lighting, or for creative effect.
The PROND filters use Hoya’s exclusive clear optical glass that has a
metallic ACCU-ND coating front and back to create the neutral density
affect.
Neutral density filters are designed to reduce the amount of light
entering your camera lens and should not have any other effect on the
image. Reducing the amount of
light allows for the use of wider
apertures or slower shutter speeds for creative and dramatic effect in
bright lighting conditions.
The HOYA PROND 200 is a dark neutral density filter with a filter
factor of 200. This filter factor converts to a 7 2/3 stops light loss.
This is a great filter for blurring motion
a lot on a sunny day.
Example: In daylight maybe the slowest shutter speed available with a
filter is 1/60 sec’ at F/22. By adding the PROND 200 a shutter speed of
4 full
seconds would be possible.