These are Neutral Density Filters used for Cinematography. They have a Neutral Density of .3, .6, .9, 1.2. A common use for these filters are to allow the use of larger apertures, reducing depth of field to allow selective focus and rack focus.
Available in the following Strengths and Models:
ND .3 (68-040338) sku# 5145 (exposure adjustment = 1 stop, reduces ISO by 1/2)
ND .6 (68-040638) sku# 5146 (exposure adjustment = 2 stops, reduces ISO by 1/4)
ND .9 (68-040938) sku# 5147 (exposure adjustment = 3 stops, reduces ISO by 1/8)
ND 1.2 (68-041238) sku# 5148 (exposure adjustment = 4 stops, reduces ISO by 1/16)
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.
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