Nikon SB-25, Instruction Manual

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FP High-Speed Sync Flash
Chapter
4
6 Choose a shutter speed* from 1/250 to 1/4000 sec. on
the camera
* Although any shutter speed can be used, an uneven exposure may result with
speeds outside this range.
7 Set your desired aperture on the camera.
8 Focus on the subject.
Look into camera viewfinder and compose shot while lightly
pressing the shutter release button.
9 Confirm aperture and shutter speed in the camera’s
viewfinder.
Check whether subject is focused by using the in-focus
indicator
I
.
10 Set the aperture value (from step 7) in the SB-25’s
LCD panel.
See “Setting Aperture Value (Manual Adjustment),” pages
28 to 29.
The aperture value is automatically set and indicated in the
SB-25’s LCD panel when the camera is used with an AF
Nikkor lens (including the latest D-Type) or a Nikkor lens
having a built-in CPU.
An indicator bar
appears to show the appropriate
shooting distance.
5 Press button until appears in the LCD panel,
and confirm or appears in the light amount indicator
while LCD indication changes: - - - -
- - - - - -.
Next, choose either for FP1 flash operation or for FP2.
In a bright scene
After you have adjusted the camera/flash-to-subject
distance (with subject standing at the location repre-
sented by indication bar
), readjust indicator bar
(from step 11) to the left by one or two steps so the
bar indicates a position closer than the actual subject
location.
Experience indicates that a small amount of under-
exposure may result in a more pleasing photograph.
To readjust the indicator bar, perform one or a com-
bination of the following adjustments:
1) Pressing button to switch from FP1 (
with ) to FP2.
2) Moving further from the subject.
3) Choose a different number for the zoom-head
position (wider angle of coverage).
We recommend that you not manipulate shutter
speed and aperture on the camera.
Detaching the SB-25
When you take off the Speedlight from the F90-
Series/N90 to use it with another camera, be sure to can-
cel FP flash operation by pressing the
button: con-
firm disappears from the LCD panel. If it is removed
with FP setting, blinks a warning. The SB-25 will not
function normally with the FP setting when mounted to
any model other than the F90-Series/N90.
Shifting to other mode
Shutter speed is automatically locked at 1/250 sec., if
you have set a shutter speed at 1/250 sec. or faster, then
you perform one of the following:
a. Switch exposure mode to programmed auto on the
camera, or
b. Change from FP High-Speed Sync to another flash
operation on the Speedlight.
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