The Formatt 48mm Neutral Density (ND)2.1 HD Schott-Desag B270 Crown Optical Glass Filter has several uses and offers the possibility to achieve otherwise unachievable results. They enable the shooter to adjust exposure without affecting color balance. ND filters appear grey and reduce the amount of light reaching the film.
Determining which neutral density filter yields ideal results for any given lighting situation takes knowledge, experience and a collection of such filters. Speaking generally, the 2-stop value (ND 0.6) effectively compensates average situations.
Note! Neutral Density filters are available in grades 1,2,3,4,5,6,7 and 8 stops to suit individual needs
- Formatt's Neutral Density Filters are a response to the many DPs and cinematographers who find that it is important to shoot as wide open as possible to minimize depth of field - especially with HD - In response to the professional demand for an optically correct and pristine neutral density filter for HD, Formatt designed its HD Neutral Density Filters, which are the ultimate solution to enhance color contrast and are ideal for normal light reduction - Available in all the popular round screw-in sizes and all the standard square sizes - All Formatt filters are finished with a unique edge frame offering maximum protection against chipping, surface scratches and enables easy handling and cleaning - With the filter description on top of the frame it also makes identification of the filter much easier especially when filters are stored in cases on location - Formatt HD Neutral Density filters have the same densities and light stops as the Kodak Wratten Standards
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
- ND.3 (exposure adjustment = 1 stop, reduces ISO 1/2) - ND.6 (exposure adjustment = 2 stops, reduces ISO 1/4) - ND.9 (exposure adjustment = 3 stops, reduces ISO 1/8) - ND1.2 (exposure adjustment = 4 stops, reduces ISO 1/16)