Hoya NDx400 HMC Filter | 77mm
Hoya NDx400 HMC Filter | 77mm
The Hoya 77mm NDx400 HMC Filter is a solid neutral density filter that enables a 9-stop increase in exposure length. The optical 2.7 density creates 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.
Multi-coated to minimize reflection at the filter surfaces which reduces flare and ghosting.
Neutral Density filters have four main uses
- To enable slow shutter speeds to be used, especially with high speed films, to record movement in subjects such as waterfalls, clouds, or cars
- To decrease depth of field by allowing wider apertures to be used, which helps separate subjects from their background
- To decrease the effective ISO of high speed film (above ISO 400) and allow it to be used outdoors in bright situations
- To allow cine and video cameras (which have fixed shutter speeds) to film subjects such as snow, sand or other bright scenes which could cause overexposure
Neutral Density Factors
- 2x = ND.3 (exposure adjustment = 1 stop, reduces ISO 1/2)
- 4x = ND.6 (exposure adjustment = 2 stops, reduces ISO 1/4)
- 8x = ND.9 (exposure adjustment = 3 stops, reduces ISO 1/8)
- As one of the premier filter manufacturers, Hoya filters continue to made from quality glass assuring the photographer clear, sharp and accurate images
- Hoya filters consistently provide even color all the way through the filter; All surfaces are ground and polished to specific thickness and tolerances