Formatt 72mm Neutral Density (ND) 2.4 Filters have several uses and offer the possibility to achieve otherwise unachievable results. They enable the shooter to adjust exposure without affecting color balance. ND filters appear gray 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.
Formatt, a company with three generations of professional filter-making experience produces every filter to the highest technical standards. The finest materials, together with state of-the-art production technology have resulted in a standard of optical excellence unmatched anywhere else.
- This filter allows the user more precise control; designed for HD (High Definition), these filters can be used to enhance color contrast as well as normal light reduction - an example is increased sky detail on a dull overcast day
- Formatt HD neutral density filters have the same densities and light stops as the Kodak Wratten Standards
- Optically consistent filter to filter
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 situation
- 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 by 1/2)
- ND.6 (exposure adjustment = 2 stops, reduces ISO by 1/4)
- ND.9 (exposure adjustment = 3 stops, reduces ISO by 1/8)
- ND1.2 (exposure adjustment = 4 stops, reduces ISO by 1/16)
- ND1.5 (exposure adjustment = 5 stops, reduces ISO by 1/32)
- ND 1.8 (exposure adjustment = approx. 6 stops, transmits 1% of light)
- ND 3.0 (exposure adjustment = 10 stops, transmits 0.1% of light)
- ND 4.0 (exposure adjustment = 13-2/3 stops, transmits 0.01% of light)
- ND 6.0 = (exposure adjustment = approx. 20 stops)