Hoya 72mm HMC NDx400 Filter: This Filter is a lightweight and durable filter which is perfect for photographing extremely bright subjects such as solar eclipses, industrial welding processes and other ultra-bright light sources. It reduces light values by 9 stops to less than 1/500th of its original intensity and allows safe photography. This filter features a three-layer HMC multi-coating, which provides 98-99% light transmission and helps to reduce internal flare and reflections. It is constructed from high-quality optical glass for notable image clarity and is set in a durable aluminum filter ring.
It can also be used to achieve super slow shutter speeds in daylight to render moving subjects invisible. These popular filters are renowned for their ability to minimize reflection at the filter surfaces which reduces flare and ghosting. 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.
Ideal for high speed films, to record movement in subjects such as waterfalls, clouds, or cars
Minimize reflection at the filter surfaces which reduces flare and ghosting
Super slow shutter speeds in daylight to render moving subjects invisible
For bright, high contrast, sharp and well balanced colour photos
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
To decrease the effective ISO of high speed film (above ISO 400) and allow it to be used outdoors in bright situations