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Exposure chart
With TTL metering you need not adjust for the filter but for those who have asked here is the Absorption data

Filter Factor indicates the exposure increase required for a filter:
For example the filter factor is 8 for the #003 red filter. Without the filter in place the exposure meter indicates an exposure of 1/250 second at f/11. So with a of Filter factor 8 (divide 8 into 250) = 1/30 second at f/11. This gives us a 3 stop increase in exposure.



Ref #
Designation
Filter Factor
F-Stop
001
2
1
002
2.5
1.1/3
003
8
3
004
4
2
005
4
2
006
1.5
2/3
020
2.4
1.1/3
021
2
1
022
2.4
1.1/3
023
1.3
1/3
124
1.5
2/3
025
1.6
2/3
026
1.4
1/3
027
1.4
1/3
028
1.4
1/3
029
2
1
030
2
1
031
2.3
1.1/3
035
1.3
1/3
036
2.4
1.1/3
037
1.5
2/3
040
1.3
1/3
041
1.3
1/3
042
1.3
1/3
045
2
1
046
2
1
047
1.5
2/3
050
2.3
1.1/3
055
1.5
2/3
056
1.5
2/3
057
1.5
2/3
058
1.5
2/3
059
1
-
060
1.3
1/3
061
1.3
1/3
062
1.3
1/3
063
1.3
1/3
064
1.3
1/3
065
1.3
1/3
066
1.3
1/3
067
1.3
1/3
068
1.3
1/3
070
1.3
1/3
071
1.3
1/3
072
1.3
1/3
073
1.3
1/3
074
1.3
1/3
075
1.3
1/3
076
1.3
1/3
077
1.3
1/3

Ref #
Designation
Filter Factor
F-Stop


078
1.3
1/3
080
-
-
081
-
-
082
1.5
2/3
083
1.3
1/3
084
1.3
1/3
085
1.3
1/3
086
1.3
1/3
087
1.3
1/3
088
1.3
1/3
089
1.3
1/3
091
1.3
1/3
092
1.3
1/3
093
1.3
1/3
101
1.3
1/3
102
1.3
1/3
103
1.3
1/3
111
1.3
1/3
112
1.3
1/3
113
1.3
1/3
120
1.3-2
1/3-1
121
1.3-4
1/3-2
121L
1.3-4
1/3-1.2/3
121S
1.3-8
1/3-3
121F
1.2/3-8
1/3-3
122
1.3-2
1/3-1
123
1.3-4
1/3-2
123L
1.3-2
1/3-1
123S
1.3-4
1/3-2
123F
1.5-8
1.2/3-3
124
1.3-2
1/3-1
125
1.3-16
1/3-4
125L
1.3-4
1/3-2
125S
1.3-8
1/3-3
125F
1.5-8
2/3-3
126
1.3-4
1/3-2
128
1.3-4
1/3-2
129
1.3-4
1/3-2.5
130
1.3-4
1/3-2
131
1.3
1/3-3
132
1.3
1/3-2
133
1.3
1/3-3
138
Gradual FLW
1.3
1/3-1
139
Gradual FLD
1.3
1/3-1
140
1.3
1/3
141
1.3
1/3
142
1.3
1/3
143
1.3
1/3
144
1.3
1/3
145
1.3
1/3

Ref #
Designation
Filter Factor
F-Stop


148
1.3
1/3
149
1.3
1/3
150
1.3
1/3
151
1.3
1/3
152
2
1
153
4
2
154
8
3
160
4
2
161
4
2.1/3
162
4
2.1/3
163
4
2.1/3
164
4
2
165
1.5
2/3
170
4
2
171
4
2
172
4
2
173
4
2
174
4
2
185
1.3
1/3
186
-
-
187
1.5
2/3
188
1.3
1/3
189
1.5
2/3
190
-
-
191
-
-
192
-
-
193
-
-
195
1.3
1/3
196
1.3
1/3
197
2
1
198
4
2
201
1.5
2/3
202
1.5
2/3
203
1.5
2/3
204
1.5
2/3
209
1.5
2/3
216
2
1
217
2
1
219
2
1
220
-
-
230
-
-
232
-
-
340
-
-
342
-
-
345
-
-
346
-
-
375
-