Nikon SB-900 Bedienungsanleitung PDF herunterladen (Seite 104)

D–54

Flash modes and functions

SU-4 type wireless multiple flash shooting

t Adjusting the ﬂ ash output level of the remote ﬂ ash units in the

M (manual) mode

Adjusting the ﬂ ash output level manually

Use the following equation to determine the proper manual flash output level of

the remote flash unit, depending on your creative preferences.

GN = F × D, where GN is the guide number of the remote ﬂ ash unit (in

meters/feet), F is the lens aperture in use, and D is the distance between

the remote ﬂ ash unit and the subject (in meters/feet).

For example, with the SB-900’s zoom position adjusted to 18 mm, using an

ISO sensitivity of 100, standard illumination pattern, in FX-format, shooting a

subject at a distance of 2 m (6.6 ft.) with a lens aperture of f/5.6, then

GN (in meters)= 5.6 x 2 = 11.2, or GN (in feet)= 5.6 x 6.6 = approx. 37.

Therefore, to get the correct exposure, refer to the Guide Number table

(kF-19) and adjust the flash output level to M1/4.

Refer to “Determining the aperture, flash output level and flash shooting

distance in the Distance-priority manual and Manual flash mode” (kD-22).

Adjusting the ﬂ ash output level in Non-TTL auto ﬂ ash (A);

applicable when using a Speedlight compatible with Non-TTL

auto ﬂ ash mounted on the SU-4 (optional)

Non-TTL auto flash (A) can also be selected on the remote flash unit. In this

case, the remote flash unit controls the flash output based on the aperture and

ISO sensitivity set on the remote flash unit, and automatically stops firing in sync

with the master flash unit (kD-8).

Set the same ISO sensitivity on the remote flash unit as set on your camera.

Set the same aperture on both the lens and the remote flash unit to obtain the

correct exposure.

Depending on your creative preferences, you can intentionally overexpose or

underexpose the picture by modifying the aperture.

The above setting is applicable only when both the master and remote flash

units face the same direction.

Refer to “Flash shooting distance range” (kF-16) for more details.

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Nikon SB-900 Bedienungsanleitung Seite 104