88
Adjusting the flash output level in M (manual) mode
Adjusting the slave flash unit’s flash output level manually
m
Use the following equation to determine the proper manual flash output level
of the slave flash unit, depending on your creative preferences.
GN = F x D
where GN is the guide number of the slave flash unit (in meters/feet), F is the
lens aperture in use, and D is the distance between the slave flash unit and
the subject (in meters/feet).
For example, when using an ISO sensitivity of 100 and shooting a subject at a
distance of 2m (6.6 ft.) with the SB-80DX’s zoom-head position adjusted to
28mm, and a lens aperture of f/4,
GN = 4 x 2 = 8 (in meters)
GN = 4 x 6.6 = approx. 26 (in feet)
Therefore, to get the correct exposure, refer to the Guide Number table (p. 45)
and adjust the flash output level to M1/16.
n
Refer to “Determining the aperture and flash output level in the Manual mode” (p. 44).
Adjusting the slave flash unit’s flash output level in the Non-TTL auto
flash (A) mode
m
Determine the flash output level by setting the aperture on the slave flash unit
and camera.
1
Set the same ISO sensitivity on the slave flash unit as set on your camera.
2
Set the same aperture on both the lens and the slave flash unit to obtain the
correct exposure.
n
Depending on your creative preferences, you can intentionally overexpose or
underexpose the picture by modifying the aperture.
n
The above setting is applicable only when both the master and slave flash units are
pointed in the same directions. Not applicable, if the directions differ.
n
Refer to “Setting apertures in the non-TTL auto flash mode” (p. 41) for more details.
Wireless multiple flash shooting
Summary of Contents for autofocus speedlight SB-80DX
Page 1: ...En Instruction Manual Autofocus Speedlight SB 80DX SB 80DX En ...
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