Nikon Speedlite SB-800 - Manual (Page 61)

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compensation
Making exposure compensation in Non-TTL auto flash and Manual flash
operations
Exposure compensation is performed by intentionally modifying the correct
aperture.
• In the Non-TTL auto flash mode, the correct exposure can be obtained when the same
aperture is set on the camera as that set on the SB-800. Therefore, to make exposure
compensation, vary the aperture set on the camera while retaining the aperture set on
the SB-800 or vice versa.
• In the Manual flash mode, calculate the proper aperture for the correct exposure from
the guide number and the shooting distance (p. 43). Then, use a larger or smaller
aperture on the camera to make exposure compensation.
• As a basic guide, set a wider aperture on the camera or lens to make the main subject
brighter or a smaller aperture to make it darker.
■ ■ ■
Making exposure compensation for the main subject only
In TTL auto flash mode and Auto Aperture flash operation
Making exposure compensation for a flash illuminated main subject without
affecting the background exposure by adjusting the SB-800’s flash output level
is called flash output level compensation (p. 56).
• This compensation can only be performed with cameras compatible with CLS, digital
SLRs not compatible with CLS, cameras in Groups I to III, and COOLPIX cameras
compatible with i-TTL.
In Manual flash mode
Making exposure compensation for only the flash illuminated subject by
intentionally modifying the SB-800’s flash output level (M1/1 to M1/128).
• For cameras in all groups.
■ ■ ■
Making exposure compensation for the background only
Set the camera’s exposure mode to Shutter-Priority Auto (S) or Manual (M), and
set the shutter speed to one slower than its flash sync shutter speed.
• With cameras providing slow-sync, set the camera’s flash sync mode to Slow-sync
(p. 58) to bring out background details in low-light situations.
• For details, see your camera’s instruction manual.
Other functions