Nikon 58-104 Bedienungsanleitung PDF herunterladen (Seite 44)

In manual mode, you can determine the correct f/stop using the following

equation:

f/stop =

guide number

flash-to-subject distance

See table below for the guide number at various film speed.

Guide number at various film speed

m (ft)

Light

Underwater shooting

output

ISO 25 50 64 100 200 400 800 1000

M Full 8(26) 11 (36)

12(39) 16(53)

22 (72) 32(105) 45 (148) 50(164)

u 1/4

4(13) 5.6(18) 6(20)

8(26)

11 (36) 16(53)

22 (72)

25 (82)

M 1/16 2(7)

2.8 (9)

3(10)

4(13) 5.6(18) 8(26) 11 (36)

12(39)

m(ft)

Light On-land shooting

output

ISO 25 50

100

200

400 800 1000

M Full 16(52) 22 (72) 25 (82)

32(105)

45 (148)

64 (210)

90 (295) 101 (331)

U 1/4

8(26) 11 (36) 12(39)

16(52) 22 (72)

32(105) 45(148)

50(164)

M 1/16 4(13) 5.6(18) 6(20) 8(26) 11 (36)

16(52) 22 (72) 25 (82)

• Caution

•Guide numbers under water vary according to water conditions.

•When aiming the Speedlight diagonally, open the aperture 1/2 to 1

step wider (smaller f-number) than the aperture value obtained in the

above equation to compensate for the different angle of reflection.

•When taking photographs with the arm removed from the bracket,

Nikon recommends you to take various pictures with different

apertures by adjusting the camera-to-subject distance.

I Important

If the camera-to-subject distance is actually measured underwater,

multiply the measured distance by 3/4 to get the estimated distance

undenwater.

For example, if the actual camera-to-subject distance is 1.33 meters

(4.3 feet), set the lens distance scale to 1 meter (3.3 feet), and read the

"1 meter” column on the exposure calculation chart.

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