Nikon Speedlight Unit SB-4 Manuel utilisateur

flikon SPEEDLIGHT UNIT

)B.4

INSTRUCTION MANUAL

NOMENCLATU RE

Auto/manual selector

Synch socket

Mounting foot

Locking nut

Hot-shoe contact

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Colored exposure

index

Flash-to-su blect

distance scale

(in meters)

F/nu mber scale

Flash-to-su b ject

d istance scale

(in feet)

Calculator disc

Film speed index

Power switch

Ready-light

Open flash button

(Test firing button)

Battery compartment lid

CONTENTS

Foreword..... ... ..... o. 5 Accessories............... .19

Features .... o..... . o . 6 SynchcordSC-8. ........ .19

fnstallingthe batteries . . . . . . . . 7 Flash unitcouplerAs-l. . . . . . .20

Setting-up/ Nikkormataccessoryshoe.. ...20

flash synchronizatioll . . . . . . . . . . 8 Features/specifications . o . . . . . .21

Nikon F2-series and F cameras . . 8 Cam eralspeedlight

Nikkormat ELrFT2and FTr.u . . .10 combination chart. . . . . . . . . . . .22

Nikon Rl 0, R8 Super Zoom . . . .12

Automatic exposure operation. . . . .14 r

Example of automatic

exposure operation . . . . . . . . .,',6

Testfiring/openflash. .. .. .. .'i.7

Manualoverride . . . . . . . . . . .18

Example of manuat override

operation. . . . . . . . . . o . ' . .18

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FOREWORD

Nikon Speedlight Unit SB-4 has a built-in

computerized series-control system using

an SCR (silicon control rectifier) which

automatically adjusts light intensity for

effective flash photography at all times.

It is compact and lightweight for greater

convenience. The speedlight can be

mounted directly on a camera which has

a hot-shoe contact'or on a camera with a

standard accessory shoe using a synch

cord. ( For cameralspeedlight combina-

tions, refer to the chart on pp. 22-23.1

FEATU RES

Autom atic exposure control

The amount of light output emitted from

the speedlight is automatically controlled

according to the flash-to-subject distance

within a range of 4m to 0.6m; this removes

all worries about exposure calculation.

Compact and lightweight

The SB-4 is designed compact and light-

weight for greater convenience in picture-

taking situations which require quick re-

sponse.

Shortened recycling time and

increased firings

The unit's series-control system reduces re-

cycling time drastically, especially at short

distances. Since the speedlight consumes

only the required amount of power for a

flash assignment and stores excess electric

energy, battery life is extended; consequent-

ly, the number of firings is increased.

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INSTALLING THE BATTERIES

l. First unlock the battery compartment

cover by depressing its knurled part with

your thumb; slide down to fully open.

l. Then insert two 1.5V AA-type batteries

in the compartment, making sure the

positive and negative (+ and -) terminals

are set in place following the diagram

inside the battery compartment.

3. Depress the compartment cover inward

until it locks into place.

CuLttiorr: llluke sure you rcmove the botteries

*,ltert tltc urtit is not used I'or o lonrt period

of time.

SETTI NG-UP/F LASH SYNCH RON IZATION

Attaching the Sts--l ro rhe Nikorr

F2-series and F cameras

First attach the flash unit coupler AS-1

onto the camera's accessory shoe. Then

turn the locking nut on the SB-4's

mounting-foot until it reaches the upper

limit. Slide the mounting foot forward

onto the AS-1's accessory shoe as far as

it will go. Finally, tighten the locking nut

to secure the unit in place and prevent it

from accidentally slipping off.

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Flash synchronization

With the Nikon F2-series cameras, a built-in

synch selector mechanism controls speed-

light synch adjustment automatically as you

change shutter speeds. Set the shutter speed

at 1/80 sec. or slower. (Note that the red line

between 1/60 and 11125 indicates 1/80 sec.)

With the Nikon F, a synch selector is adopt-

ed to adiust the camera for use with the

speedlight. First set the shutter speed at

1/60 sec. or slower. Then lift and turn the

knurled synch selector ring around the

shutter-speed dial of the camera until the

FX mark appears in the selector window.

(Note thot tlte Photomic FTu finder must

be removed to qoin occess to the synch

se lec tor ring. )C

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