81
High-Speed Sync Guide Number
*With the wide-angle panel attached
ISO
Shutter
speed
Camera format
Zoom position
35mm
85mm
70mm
50mm
35mm
28mm
24mm
*20mm
DIGITAL
58mm
48mm
34mm
24mm
19mm
16mm
*13mm
645D
106mm
87mm
62mm
43mm
35mm
30mm
*25mm
ISO100
250
16.0
14.7
13.4
11.1
9.8
9.4
6.2
500
12.7
11.6
10.6
8.8
7.7
7.4
4.9
1000
9.5
8.7
7.9
6.6
5.8
5.5
3.7
2000
6.9
6.4
5.8
4.8
4.2
4.1
2.7
4000
5.1
4.7
4.2
3.5
3.1
3.0
2.0
6000
4.3
3.9
3.6
3.0
2.6
2.5
1.7
ISO200
250
22.6
20.8
19.0
15.7
13.9
13.3
8.8
500
18.0
16.4
15.0
12.4
10.9
10.5
6.9
1000
13.4
12.3
11.2
9.3
8.2
7.8
5.2
2000
9.8
9.1
8.2
6.8
5.9
5.8
3.8
4000
7.2
6.6
5.9
4.9
4.4
4.2
2.8
6000
6.1
5.5
5.1
4.2
3.7
3.5
2.4
ISO400
250
32.0
29.4
26.8
22.2
19.6
18.8
12.4
500
25.4
23.2
21.2
17.6
15.4
14.8
9.8
1000
19.0
17.4
15.8
13.2
11.6
11.0
7.4
2000
13.8
12.8
11.6
9.6
8.4
8.2
5.4
4000
10.2
9.4
8.4
7.0
6.2
6.0
4.0
6000
8.6
7.8
7.2
6.0
5.2
5.0
3.4
AF360FGZ_OPM_ENG.book Page 81 Friday, January 14, 2011 12:58 PM