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Nikon SB-24 See table for the guide numbers at various film speeds, 200, 800 1600

Models: SB-24

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GUIDENUMBER------------~~~~~~~~~~~

In manual flash and Repeating-Flash modes, apart from checking the shooting distance in the LCD panel , you can also determine the correct flstop using the following equation.

fl t _

guide number

s op -

flash-to-subject-distance

See table for the guide numbers at various film speeds.

Guide number at various film speeds

 

 

 

meters (feet) at ISO 100

 

 

 

 

 

 

Light output

24mm

28mm

35mm

50mm

70mm

85mm

 

 

 

 

 

 

 

 

 

~

 

 

 

 

 

 

 

50

(164)

1/1

30(98)

32(105)

36(118)

42 (138)

47 (154)

1/2

21 (69)

22 (72)

25 (82)

30 (98)

33

(108)

36

(118)

1/4

15 (49)

16 (52)

18 (59)

21

(69)

23

(75)

25

(82)

1/8

10.5 (34)

11 (36)

12.5 (41)

15 (49)

16.5

(54)

18

(59)

1/16

7.5(25)

8 (26)

9(29)

10.5 (34)

11 .5

(38)

12.5

(41)

 

 

 

 

 

 

 

 

..

 

For film other than ISO 100, multiply the above figures by the follOWing magnifications:

ISO 25 xO.5

50xO.71

200x1.4

400x2

800x2.8

1600 x4

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Page 80 Page 82
Page 81
Image 81
Nikon SB-24 See table for the guide numbers at various film speeds, Guide number at various film speeds, 200, 800 1600
Page 80 Page 82