Minolta AUTO ELECTROFLASH 450 Owner's manual

MINOLTA

AUTO

ELECTROFLASH

450

OWNER'S

MANUAL

e

NAMES

OF PARTS

Wideangle diffuser

Flash

tube

and ref

lector

with

guard

window

Built-in

sensor

Mon

itor lamp

Bracket

rel

Cartridge

socket

Connector

Cartridge-socket cap

Connecting

bayonet

Cartridge

rel

AM

battery

cartri

Tripod

socket

Bracket

Attaching

screw

and

k

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Distance

scale

510v

power

socket

Aperture

scale

Control knob

Normal/wide

switch

F

ilm-speed

window

Power

switch

Open-f lash/test

bu

tton

H

andgrip

Sy

nc.-cord

/sepa

rate-senso

r

soc

ket

Sync.

cord

Optional

accessories

510v battery

pack

N

i-Cd

battery

cartridge

Ni-Cd

battery charger

Separate sensor

Sensor sync.

cord

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ra

S-PECIFICATIONS

Type: Versatile

bracket-type

automatic/manual

electronic flash

unit

.5

with

energy-saving

series-SCR

(thyristor)

circuit

Flash

duration:

1/20,0001o 1/6Ob

sec. in

automatic operation,

1/600

in

manual

(

non-automatic) operation

Flash

power:

Up

to

79

Ws

Color temperature.

Balanced

for daylight-type

color

f

ilm

Coverage

and

guide

number:

Normal:

45"

horizontally,

30" vertically

for

normal or

longer

l?n: lefi; ;"i.3?ffi

;I ;Riflil,lT1'5i:$J,:.3,i;

in meters

at ASA 10O,74

in

feet

at ASA 25,

or 32for

meters

at DIN 18

wid

ea ns I erLs'

i%i

jj:i:i

;:

"ELP'?:iti.?,

i

y

to,. widea

ng

I e r enses

(e.9.,

down

Io

24mm

on full-frame

35mm

cameras)

at

in

feet

at ASA 25.

or i

6

for

meters

at DIN 1B

Working

ranges

at ASA

100:

Normal

Wideangle

F2.8. 1.8

-16

m

(6'-52')

1.8

-7.9m

(6'-26')

F4: 1.3

-11

m(4'-36')

1.3

-5.bm

(4'-18')

F5.6:

0.9

8

m

(3'

-

26'1

0.9

-

3.9m

(3'

-

13')

FB

:

0.6b

-

b.bm

(2,2,,_

18,)

0.6b

_

2.gm

(2,2,'_

g,)

Fl1:

0.5

4

m(i'8"-13')

0.5

-2.0m

(7'8"-G'7"1

Built-in

sensor:

Silicon

photo

diode with 23"

angle of

acceptance;

inoperable

when

separate

seAsor

attached

Power

sources:

6

alkaline-

6

nickel-

manganese

cadmium

b10v

'

AA cells

battery

Number

of flashes:

At full

power:

70

-900*

b0

-

420

2OO

*2OOO

Within

% stop

under

full

power:

100

-

1100

b0

-

420

300

-

3OO0

/

Recycling time:

To full

power:

To

within % stop

under

full

power:

1-23"

0.33-7

0.33-3

1-14

0.33-4

0.33_2

*

Depending

upon

subject distance

controls:

Dial for

setting

film

speeds

ASA 25

-

400

(DlN

15-2v),

knob

to set computer for

apertures F1

.4

-

F22

in auto operation

or

switch

over

to

manual,

normal/wide

switch,

power

switch

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Monitor-circuit

lamp:

Accessories:

Size

and weight:

Glows steadily to indicate

capacitor is

charged to

provide

expo-

sure

within

% stop

of

full

{rarge

and blinks when fully

charged

Supplied

with

basic unit, connector,

and bracket:

Sync. cord and AM

battery cartridge

Optional: Separate

sensor

(specs

same as built-in sensor),

sensor

sync.

cord, Ni-Cd battery

cartridge, 510v battery

pack

with cord,

and

Ni-Cd battery

charger

Width

98mm

(37/e"),

depth 103mm

(41k"1,

height 230mm

(9tk"l;

TBOg

(27%

oz.l

CONNECTING

COMPONENTS

1. To

attach

connector

to handgrip,

loosen

the

holder

band

byt

turning

both screws

on the

opposite side

of

the connector

counterclockwise.

Then

slide

the

band over

the end

of the

handgrip

to the

desired

position,

rnake

sure

the connector

is

at the

desired

angle

(normally

90") to the flash

lighting

axis,

and tighten

the

band

in

place

by turning

the screws clockwise.

2. To

attach

the

bracket

to the camera,

begin screwing

the

attaching

screw

into

the camera

tripod

socket,

careful-

ly

align

bracket

at right

angles

to

the

lens

axis,

and

tighten in

place

with the

knob.

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3.

To attach the

bracket

to the connec-

tof,

first

depress

both bracket release

grips.

While

doing

this, slide

the con-

nector's headed

stud into

the slot on

the

bracket

as

far

as it

will

go.

Align

the

rearmost

white dot

on

the con-

nector

with

the

index

on the bracket

and

release

the

grips.

4.

Plug the

sync. cord into

the

socket

provided

on

the

handgrip

and connect

the

other end with the

X sync.

flash

terminal of the camera.

NOTE:

When

the flashgun is

used attached

to

the bracket,

it

should

be kept

pointed

straight

ahead

parallel

to the lens

axis at

usual distances.

For

close-ups, it

should

be turned slightly so

as to

point

at

the

center

of the subject.

LOADING

AND

ATTACHING

AM BATTERY

CARTRIDGE

1.

To load,

remove

the

cover from

the

AM

battery

cartridge

by turning

the

screw

counterclockwise.

Insert

six

AA-

size

(penlight)

i.5v

alkali-manganese

cells

(Mallory

MN-1500

or equivalent)

with

positive

(+)

and negative

(-)

ends

positioned

as indicated

inside

the

car-

tridge.

Then

align

the

projections

on

the

cover

with

the

matching

inden-

tions

on the

cartridge

and fasten

the

two

parts

firmly

together

again

by

means

of the

screw.

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2. f o attach,

with the flashgun

power

switch

in

the

OFF

position

insert the

connecting bayonet

of

the cartridge

into the cartridge socket

at

the end of

the

handgrip,

push

the two

parts

to-

gether

slightly and turn the cartridge

clockwise or

counterclockwise until

it

locks in

olace.

3. The

cartridge

is

removed by

sliding

the

cartridge

release

away from the

hand-

grip

and turning

the cartridge

in

either

direction

until

its

bayonet

can

be

lifted

out of

the

socket.

USUAL

DIRECT

OPERATION

Automatic

1.

For

normal

or telephoto lenses*,

the

wide/normal

srrritch

on

the

back

of the

flashgun

should

be

snapped

all the

way

into

the

NORMAL

position

and

the

clear

guard

w.indow

in

front

of the

flash tube

and

sensor

should

not

be

covered

or obstructed

by

anything.

2.

Make- su

re that

the camera is

set for

X-synch ron

ization

and/or

that the

flashgun is

properly

connected

with

the

X-sync. terminal

of

the

camera.

3.

Also

make sure

that

the camera

is

not

set for

a

sh

utter

speed

faster than

the

manufacturer's

recommendation f or

electronic

flash

in

the instruction

manual.

(Between-the-lens

blade shut-

ters

can

often

be

set

at

speeds

up to

1

/500

sec., wh

ile 1

/60

is

often

the

max

imu

m safe speed

for f u

ll-f rame

35mm

cameras

with focal-plane

shut-

ters;

if in

doubt, use

1l3O

sec.

with

the

latter.

)

*

of 50mm

focal

length

or

longer

on

ful

l-frame

35mm cameras

www.orphancameras.com

4.

By

means

of the

grooved

rim

of

the

f

lashgun's

control

dial,

turn

it

until the

index

is

aligned

with the

speed

rating

of

the film

in

use.

(Dots

on

the

film-speed scale

represent

ASA

ratings

of 32,40,64, 80,

125, 160,25O,

and

32O or D

lN indexes

of

16,

17

,

19,20,

22, 23,

25,

and 26,

respectively from

left

to right.)

5. The computer

will

vary

flash duration

f rom

1/600 to

1

120,000

sec. to

pro-

vide auto-flash

exposure at the range

of

f

ive

F-n

u

mbers

appearing

in

the

g

reen area

v isib

le

th rough th e apertu

re

scale. Turn

the

control knob

to set the

wh

ite

index

at

the

desired

apertu re

with

in

th

is

range.*

(The

index may

be

set

between click-stops

if

desired.) The

ends

of the two circular

red

lines

on

the

distance

scale indicate

the maxi-

mum

range

of the flash

at

the

aperture

set.

Note

th

is

caref

ully, since

average

subjects

wil

I

be underexposed

at

d

is-

tances

fa

ll

ing

with

in

the red lines

on

the scale.

M in im

u

m

f

lash

-to-su

bject

d

istance,

on

the

other

hand

,

varies

with the aper-

ture set from

0.5

to

1.8m

(1

ft.

B

in.

to

6

ft.);

see the

specifications

(p.

6)

for

details. At

distances

shorter

than

these,

subjects will

be overexposed.

For

normal

exposure,

set

the lens

aperture

to the

same

F-number

as

set

on the

f

lashgu

n.

With a

properly

loaded

AM battery

cartridge

attached, slide

the

power

switch

to

ON.

(For

operating instruc-

tions

when using an

N

i-Cd, cartridge

or

the

510v battery

pack,

see

p.

27

or

p.

29, respectively.

)

Witfr f

resh

bat-

teries, the monitor

lamp

will come

on

with in

about ten

seconds

and will

7.

6.

www.orphancameras.com

8.

begin

to blink on and off within about

23

seconds. For

full

power,

the

moni-

tor

must be flashing before the

flash

is

fired. lf

necessary

or desirable,

how-

ever,

it may

be

f

ired

while

only

lighted

before

starting

to flash, but

in this

case, to assure adequate

exposure,

maximum flash range

should be con-

sidered

to

be

the distance appearing

at a

point

halfway between the

F-

number at

which the

index is set

and

the

next F-number to

the

right

of

it.

Further, in this

case

the

manual

guide

number is 38

for calculations

in meters

at

ASA

10O,62

in feet

at ASA

25,or

2l

in meters

at

DIN 18.

Fire

the flash by releasing

the camera

shutter. At

full

power

with

monitor

f lashing,

number

of

f lashes

per

AM

bat-

tery

cartridge will be between about

70 and 900, and

recycling

time

will

be

between one

and 23

seconds,

de-

pend

ing

upon subject

d

istance.

At

partial

power

with monitor

glowing

steadily,

number

of flashes will be

from about

1

00 to

1 1

00; recycling

time,

from

about one to

14 seconds.

For

more

flashes

or

shorter

recycling

times, use an Ni-Cd cartridge or

510v

battery

pack

(see

p.271

*CAUTION:

At

settings

to the

left

of

the

5-aperture

green area on

the

dial, adjustment

of flash

duration

is not

automatic

and

will be

at

fu

ll

power

at

a f

ixed

1

/600

sec.

Manual

operation

For

non-automatic

exposu

res

at the

max

im

u

m

f

lash

d u

rat ion

of

1

/600

sec.

:

1.

Make

f

ilm-speed

and

other camera

and

flash

adjustments

as

indicated

in

in-

structions

1

th

rough

4

on

pp.

1

2

and 1

3.

2. Turn

the control

knob index

to

the

MAN

UA

L setting.

3.

Note

the

F-number appearing

opposite

the

appl

icable

flash-to-subject

distance

at

any

point

on

the

f

lash

d

ial

(green-

area

range

lim

its

are

not

applicable

in

manual

operation).

Then

set

the

lens

aperture

on

the camera

to

this

F-

number for

normal

exposure.

www.orphancameras.com

4.

Further operation

is as described in

instructions

7

and B on

pp.

i4 and

15.

Because the flash operates at fixed

maximum

duration on

manual, how-

ever,

the

number of flashes at full

power

would be about

70,

with a

23-sec.

recycling

time; at

partial

power,

about

100

with

14 sec.

Fur-

ther,

at

partial power,

the lens aper-

ture should be opened one-half

stop

more than indicated by the dial.

(With

ASA

25 or D

lN 15 f

ilm,

f

or

example,

the

flash dial

indicates

an aper-

ture

of

between F4

and

F5.6

for

a subject

5m or

16

ft. from

the

flash.

Set

the

camera lens

aperture to the

F-number

opposite

the

applicable

d

istance

-

say,

be-

tween

F4

and

F5.6

for

a

distance

of 5m

or

16 ft.,

or one-half stop

farther

open,

i.e.,at F4for

partial power

-

and

proceed

to shoot.)

NOTE:

Exposure

at apertures

indicated

should

be

correct

for

subjects

and

surrounding

conditions

of average

reflectivity.

With

very

light-colored

subjects

andlor in

small,

bright rooms,

etc.,

exposure

may

need

to

be reduced

by closing

the lens

aperture

down

somewhat.

Dark-colored

subjects

and/or large,

high rooms;

outdoors

at

night;

and comparable

conditions

general-

ly

require

increasing

exposure

somewhat

by opening

the

lens

aperture.

The

exact

number

of stops' increase

or decrease

in

exposure

will

of course

vary

with

indi-

vidual

conditions.

lt is

generally

recom-

mendable

in non-average

conditions

to

take

"bracketed"

exposures

at

several

different

apertures.

WIDE

SW]TCH

AND

DIFFUSER

The

clear

guard

window with

the

NORMAL sl.ritch

setting will

provide

proper

f

lash

coverage and exposu

re f or

lenses

of

normal

or

longer

focal

length.

*

For

wider-angle

lenses

having a diagonal

angle of

view of up to about

85o:

* *

1

.

G

rasp the tab and

pu

ll the

opal

plastic

wideangle

d

iff

user

plate

out

of

its

storage slot,

push

the

non-tabbed

longer

edge

of

it

against

the spring

tension

into

the retaining

groove

above

the slot, and secure

it in

place

over the

f

lash

tube

with

the

lower

edge

beh

ind

the two small

tabs

at

the

bottom

of

the

guard

window.

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2.

To

adjust

the

computer

and dial

for

proper

exposu re,

snap the wide/nor-

mal sruitch

all

the

way to the Wl

DE

posit

io

n

.

3. Proceed

as

for usual

operation

(p.12],

.

In

wide.as

in

normal

operation,

if the

flash

is

to be fired

while

the

monitor

lamp is

only

lighted

but

not

blinking,

the

max im

u

m range is

the d

istance

that ap-

pears

at

a

point

halfway

between the

F-

number

at

which

the

index is

set and

the

next F-number

to the

right

of

it.

The

manual

guide

number

in wide

operation

in

this

case is

1

B

for

calculations in meters

at

ASA 100, 30

in feet

at

ASA

25, or

13

in meters

at DIN

18.

*

(i.e.,

50mm

or

more

on

full-frame

35mm

cameras)

**

(i.e.,

down

to

24mm focal

length

on

f u

ll-f

rame 35mm

cameras)

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Minolta AUTO ELECTROFLASH 450 Owner's manual

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