Nikon SB-800 Marine Instruments User Manual


 
55
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