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 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)

ND1.5 (exposure adjustment = 5 stops, reduces ISO 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)

ColorCore Technology

Tiffen filters are manufactured using ColorCore technology, a closely guarded proprietary process that entails permanently laminating the filter material in between two pieces of optical glass that are ground flat to tolerances of a ten-thousandth of an inch, then mounting them in precision metal rings

The ColorCore process allows Tiffen to control the color and density of their filters, and the characteristics of special effects filters with much greater accuracy than typical dyed-in-the-mass filters, which usually exhibit color and density variations.

Superior Quality

Top Hollywood motion picture studios rely on Tiffen filters for their multimillion-dollar productions Superior quality and design make Tiffen the overwhelming choice of moviemakers, professional photographers and even NASA

Tiffen has also been awarded an Emmy, from the Academy of Television Arts and Sciences, for its engineering excellence