Olympus 260116 ユーザーズマニュアル
46
EN
FP MANUAL
The following guide number figures have a 1/1 flash intensity ratio.
ISO100, m
ZOOM (mm)
FOUR THIRDS
8
10
12
14
17
25
35
42
With 135
16
20
24
28
35
50
70
85
Shutter speed
1/125
13
14
20
21
26
28
32
35
1/160
11
13
18
19
23
25
28
32
1/200
10
11
16
17
20
23
25
28
1/250
9.0
10
14
15
18
20
23
25
1/320
8.0
8.9
13
13
16
18
20
22
1/400
7.1
7.9
11
12
14
16
18
20
1/500
6.4
7.1
9.9
11
13
14
16
18
1/640
5.7
6.3
8.8
9.4
11
13
14
16
1/800
5.0
5.6
7.9
8.4
10
11
13
14
1/1000
4.5
5.0
7.0
7.5
9.0
10
11
13
1/1250
4.0
4.4
6.2
6.7
8.0
8.9
10
11
1/1600
3.6
4.0
5.6
5.9
7.2
7.9
8.9
9.9
1/2000
3.2
3.5
5.0
5.3
6.4
7.1
8.0
8.9
1/2500
2.8
3.1
4.4
4.7
5.7
6.3
7.1
7.9
1/3200
2.5
2.8
3.9
4.2
5.1
5.6
6.3
7.0
1/4000
2.2
2.5
3.5
3.7
4.5
5.0
5.6
6.3
1/5000
2.0
2.2
3.1
3.3
4.0
4.5
5.0
5.6
1/6400
1.8
2.0
2.8
3.0
3.6
4.0
4.5
5.0
1/8000
1.6
1.8
2.5
2.7
3.2
3.5
4.0
4.4
The guide numbers for flash intensity ratios other than 1/1 in the FP MANUAL mode
can be calculated with the following formula.
can be calculated with the following formula.
Guide number = Guide number at 1/1 × Flash intensity ratio coefficient
Flash intensity ratios and their coefficients
Flash intensity ratio
1/1
1/2
1/4
1/8
1/16
Coefficient
1.0
0.71
0.5
0.35
0.25
e00_r2062_cs2j.indb 46
e00_r2062_cs2j.indb 46
2007/08/01 14:44:02
2007/08/01 14:44:02