118
RELATION BETWEEN THE SETTING OF THE ILLUMINATION/FLASH LEVEL AND MAXIMUM RADIANCE
RELATION BETWEEN THE SETTING OF THE ILLUMI-
NATION/FLASH LEVEL AND MAXIMUM RADIANCE
When the maximum radiance is "1", the ratio of radiance is shown below in the setting of the illumination/
flash level.
Illumination level
Flash level (in OCT+Color photography and Color photography)
Display level
Ratio of
radiance
1
0.354
2
0.500
3
0.707
4
1.000
Display level
(High)
Display level
Normal (0dB)
Display level
Low (6dB)
Setting of the
flash level
(W·s)
Ratio of
radiance
25.9
1.00
21.8
0.84
18.3
0.71
15.7
0.61
12.9
0.50
10.9
0.42
9.1
0.35
+4
7.7
0.30
+3
6.5
0.25
+2
5.4
0.21
+1
4.6
0.18
0
+4
3.8
0.15
-1
+3
3.2
0.12
-2
+2
2.7
0.10
-3
+1
2.3
0.09
-4
0
+4
1.9
0.07
-1
+3
1.6
0.06
-2
+2
1.4
0.05
-3
+1
1.1
0.04
-4
0
1.0
0.04
