Guide number in Auto FP High-Speed Sync (ISO 100, m/ft)

Flash output

 

 

Zoom-head position (mm)

 

 

level

14*

24

28

35

50

70

85

 

 

 

 

 

 

 

 

M1/1

3.9/12.7

7.2/23.6

7.8/25.5

9.0/29.5

10.2/33.4

11.4/37.4

12.0/39.3

 

 

 

 

 

 

 

 

M1/2

2.7/9.0

5.0/16.7

5.5/18.0

6.3/20.8

7.2/23.6

8.0/26.4

8.4/27.8

 

 

 

 

 

 

 

 

M1/4

1.9/6.3

3.6/11.8

3.9/12.7

4.5/14.7

5.1/16.7

5.7/18.7

6.0/19.6

M1/8

1.3/4.5

2.5/8.3

2.7/9.0

3.1/10.4

3.6/11.8

4.0/13.2

4.2/13.9

 

 

 

 

 

 

 

 

M1/16

0.9/3.1

1.8/5.9

1.9/6.3

2.2/7.3

2.5/8.3

2.8/9.3

3.0/9.8

 

 

 

 

 

 

 

 

M1/32

0.6/2.2

1.2/4.1

1.3/4.5

1.5/5.2

1.8/5.9

2.0/6.6

2.1/6.9

 

 

 

 

 

 

 

 

M1/64

0.4/1.5

0.9/2.9

0.9/3.1

1.1/3.6

1.2/4.1

1.4/4.6

1.5/4.9

 

 

 

 

 

 

 

 

M1/128

0.3/1.1

0.6/2.0

0.6/2.2

0.7/2.6

0.9/2.9

1.0/3.3

1.0/3.4

 

 

 

 

 

 

 

 

*With the wide-flash adapter in place

The guide number in Auto FP High-Speed Sync above is applicable when the shutter speed is set at 1/500 sec.

The guide number in Auto FP High-Speed Sync above varies according to shutter speed. For example, when the shutter speed changes from 1/500 sec. to 1/1000 sec., the guide number decreases by 1 EV. This means that the higher the shutter speed, the lower the guide number.

ISO sensitivity factors

For sensitivities other than ISO 100, multiply the guide number by the factors shown in the table below.

ISO

25

50

100

200

400

800

1600

 

 

 

 

 

 

 

 

Factors

0.5

0.71

1

1.4

2

2.8

4

Other functions

49

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Image 55
Nikon SB-600 user manual Guide number in Auto FP High-Speed Sync ISO 100, m/ft, Factors, Zoom-head position mm Level