The Haida 4x4 (100x100mm) Neutral Density 0.9 (3-stop) Filter is constructed from high quality 2mm thick optical glass for increased optical clarity and color fidelity. Haida Neutral Density filters provide a solid stop exposure, creating a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. By slowing your exposure time or increasing your aperture you are able to control depth of field and convey movement more easily. Neutral density filters do not affect the overall coloration of the image, and help create images that would ordinarily not be possible without the proper filtration.
For those of you who enjoy blurred or motion images, this is the filter of choice since it allows you to slow down your exposure and “capture” the motion of flowing water or speeding cars, birds, or athletes
Haida Filters ship in a protective metal case.