Sirui NDX77A Overview
The Sirui 77mm Variable Neutral Density 0.3 to 2.4 Filter is a variable neutral density filter that provides an exposure reduction of 1 to 8 stops. The 0.3 to 2.4 density creates a darkening of the entire image, allowing you to photograph with a wider aperture or slower shutter speed than normally required. The degree of density is easily controlled by rotating the front filter ring, helping you to predetermine the additional exposure length required. By increasing your aperture or slowing your exposure time, you are able to control depth of field and convey movement more easily. For easier, repeatable control over density settings, the front ring is also visually demarcated with dots that correspond to different density values.
This filter is constructed from Schott B270 glass for increased optical clarity as well as color fidelity. Each glass surface is multi-coated to help eliminate internal ghosting and reflections. The Sirui 77mm Variable Neutral Density 0.3 to 2.4 Filter is also coated for resistance to oil, static, dirt, and scratches, offering greater protection to the filter and helping it to stay clean for longer than with uncoated filters. The coatings are also hydrophobic, resulting in an improved beading effect when in contact with water for greater cleaning efficiency.
- Variable neutral density filter allows you to apply differing amounts of density from scene to scene
- 0.3 to 2.4 density filter darkens the image, allowing you to photograph with a longer shutter speed or wider aperture than normally required
- Providing an exposure reduction of 1 to 8 stops, this filter allows you to control depth of field and convey movement more easily
- Offers increased flexibility to use specific ISO settings or ISO films under bright ambient light
- Provides increased exposure flexibility while using cinema or video cameras within a designated film frame rate
- Constructed from Schott B270 glass for increased optical clarity as well as color fidelity
- Multi-coated to prevent internal ghosting and reflections
- Coated for oil, static, dirt, as well as scratch resistance and provides an improved beading effect with water for more efficient cleaning
- Aluminum alloy filter ring for durability while remaining lightweight