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Color Filter Exposure Factors

The following table describes filter exposure adjustment factors for various color filters which can be used for spectral selectivity in conventional photography.

Wratten Number Color Name Daylight Factor Daylight Stops Tungsten Factor Tungsten Stops
70
Deep Red
20x
4.25
10x
3.25
29
Deep Red
20x
4.25
10x
3.25
25
Red
8x
3
5x
2.25
23A
Light Red
6x
2.5
3x
1.5
21
Orange
4x
2
2x
1
15
Deep Yellow
1.5x
0.7
1.5x
0.7
12
Deep Yellow
2x
1
1.5x
0.5
8
Yellow
2x
1
1.5x
0.5
11
Light Yellow Green
4x
2
4x
2
58
Green
8x
3
8x
3
61
Deep Green
12x
3.5
12x
3.5
44
Cyan
8x
3
8x
3
47
Blue
6x
2.5
12x
3.5
47B
Deep Blue
8x
3
16x
4
32
Magenta
8x
3
8x
3
33
Magenta
24x
4.5
12x
3.5
34A
Violet
8x
3
16x
4


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Color Filter Absorption Curves
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Light Source Color Temperatures
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