In Ttl Mode; In A Mode - Nikon SB 20 Instruction Manual

In TTL Mode
1. Set the camera shutter speed manually to a flash
synchronization speed or slower speed.
2.
Frame the background in the camera viewfinder,
turn on the camera 's exposure meter to determine
aperture for a correct background exposure, then
set the aperture on the lens.
3. Set the flash mode selector to TTL, turn on the
S8·20 and take the shot.
With a strongly backlit subject (e.g., scene which in·
cludes the sun), it may be difficult to obtain desired
exposure balance. In thi s case, use the S8·20 in M
mode.
Note:
00
not use programmed TTL flash operation for fill·in
flash photography.
In A Mode
1.
Determine correct aperture for the backl it subject
(according to method on page 25) by referring to the
S8·20's aperture selection/distance range panel,
then set both the ape rture index and the aperture on
the lens.
2. Frame the background in the camera viewfinder and
turn on camera meter to determine proper shutter
speed for the aperture set on the lens. The shutter
speed must be equal to or slower than the flash sync
speed-without a proper shutter speed you cannot
perform fill·in flash photography in A mode.
3. Set the shutter speed from step 2 on camera's
shutter speed dial.
4.
Set the flash mode selector to A, turn on the flash
unit and take the shot.
With a strongly backlit subject, perform fill·in flash
photography in M mode.
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