Kodak 3 x 3" Carbon Neutral Density (ND) 0.5 Wratten 2 Gel Filter

• Carbon Neutral Density Filter are used to reduce the intensity of light by a definite ratio, without affecting the tonal rendition of colors; improves neutrality in the UV and IR fields

Wratten 2 Improvements

• More rigid/durable

• Easier to handle

• Color consistent today, and 6 months from now as well

• Wratten 2 Optical Filters are less sensitive to humidity, less prone to static cling

• Fingerprint removal is also easier

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)

• 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)

Type

Carbon Neutral Density Wratten 2

Size

3 x 3" (75 x 75mm)

Grade

ND0.5 (exposure adjustment = 1-2/3 stops (approx)

Filter Factor

3 (32% transmission)

Multi-Coated

Not Applicable

Rotating

Not Applicable

Effect

Reduce the amount of light reaching the film

Application

To use high speed films in bright sun

Color Temperature

Not Applicable

Construction

Gelatin

Front Filter Thread Size

Not Applicable

Front Lens Cap Size

Not Applicable