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Conversion Filters for Color Films
These filters are intended for use whenever s i g n i fic a n t
changes in the color temperature of the illumination are
re q u i red (for example, daylight to artificial light). The fil t e r
may be positioned between the light source and other ele-
ments of the system or over the camera lens in conven-
tional photographic re c o rding.
*These values are approximate. For critical work, check by accurate tests, especially
if you use more than one fil t e r .
Filter Filter Exposure Increase Conversion
Color Number In Stops* in Degrees K
80A 2 3200 to 5500
Blue
80B 1
2
/3 3400 to 5500
80C 1 3800 to 5500
80D
1
/3 4200 to 5500
85C
1
/3 5500 to 3800
85
2
/3 5500 to 3400
85N3 1
2
/3 5500 to 3400
Amber
85N6 2
2
/3 5500 to 3400
85N9 3
2
/3 5500 to 3400
85B
2
/3 5500 to 3200
85BN3 1
2
/3 5500 to 3200
85BN6 2
2
/3 5500 to 3200
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