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Setting Up SB-25
1
Choose position (flash mode selector). Confirm
in the LCD panel.
2
Choose position* (flash sync mode selec-
tor).
* Since TTL Auto Flash operation can be performed regardless of the flash sync
mode selector setting, for simplicity, always leave the switch at this position.
3
Set ISO speed of the film in use. Usable film speeds
are ISO 25 to ISO 400.
For instruction, see “Setting ISO Film Speed (Manual
Adjustment),” pages 27 to 28.
4
Set the built-in zoom head position.
For instruction, see “Setting Zoom-Head Position (Manual
Adjustment),” pages 29 to 30.
Shooting indicator bars in the LCD panel move as the
figure input changes.
TTL Auto Flash Mode: For F-401/N4004 and F-401s/N4004s Users
Chapter
3
1 Flash mode
selector at
TTL Auto
2 Flash sync mode
selector at NORMAL
3 ISO speed
of film in
use
4 Zoom-head position
7 Aperture
value
Confirming Settings
7
Set aperture in the SB-25’s LCD panel*.
For instruction, see “Setting Aperture Value (Manual
Adjustment),” pages 28 to 29.
In programmed auto and shutter-priority auto exposure
mode, set an aperture using the “Guide to determine aper-
ture” in the following page.
In aperture-priority auto or manual exposure mode, set the
aperture value that you have set on the camera (from step 6).
Once aperture is set, indicator bars show the shooting
distance range for that setting.
* This operation is important for reading the appropriate shooting distance from
the indicator bars (step 8); setting a wrong aperture value on the SB-25 does
not affect all TTL Auto Flash operations — a shot will be taken with the aper-
ture set on the camera.
Setting Up Your Camera
5
Select one of the following exposure modes:
a. Programmed auto (A/S) to perform Programmed
TTL Auto Flash.
b. Shutter-priority auto (S) to perform Programmed
TTL Auto Flash.
c. Aperture-priority auto (A) to perform Standard TTL
Flash.
d. Manual exposure mode to perform Standard TTL
Flash.
6
Perform other settings:
a. For shutter-priority auto, set desired shutter speed*.
b. For aperture-priority auto, set desired aperture.
c. For manual exposure mode, set desired shutter
speed* and aperture.
* Camera automatically shifts to the fastest synchronization speed if you choose
a speed that is not within the synchronization range.
Quick reference on the relationship between
usable apertures and flash shooting distance
Use table on page 142 in this instruction manual.
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