Canon A-1 Instruction Manual - Page 77

Digital

Readout

in

Flash

Photography

When

you

preview

exposure

in

flash

photo-

graphy,

the

digital

readout

will

differ

de-

pending

on

the

type

of

flash

photography.

I.

AF.

Flash

with

Canon

Speedlites

155A

or

199A

and

an

ED

Lcns

The

flash

is

on

Auto

while

the

lens

is

set

to

the

"A"

mark.

The

digital

readout

will

display

a

shutter

speed

of

1/60

sec..

the

flash

signal

"F"

and

the

auto

working

aperture

set

on

the

fl

ash

as

follows:

60

F

2.8.

The

A-1

automatically

switches

to

1/60

sec.

when

the

flash

is

charged

regardless

of

the

shutter

speed

set

as

long

as

it

is

not

set

to

"B".

The

"F"

fl

ash

signal

appears

in

the

viewfinder

only

when

the

fl

ash

pilot

lamp

lights

up

to

indicate

that

the

flash

is

charged.

Thus.

you

will

know

the

flash

is

re

ady

simply

by

looking

in

the

viewfinder.

The

aperture

value

displayed

is

the

auto

working

aperture

you

have

set

on

the

fl

ash

depending

on

the

ASA

film

speed.

(The

aperture

displayed

in

the

readout

may

be

1/2

f/stop

larger

or

smaller

than

the

auto

working

aperture

set

on

the

flash

though

the

auto

working

aperture

is

the

effective

aperture).

The

auto

working

aperture

value

is

automatically

set

on

the

camera.

Exposure

warnings

arc

very

similar

to

those

in

shutter

-speed

priority

AE.

If

you

have

set

an

auto

working

aperture

larger

than

the

maximum

aperture

of

the

lens,

the

maxi-

mum

aperture

of

the

lens

will

flash

on

and

off

to

indicate

underexposure.

If

you

have

set

an

auto

working

aperture

smaller

than

1/16,

the

set

auto

working

aperture

will

fl

ash

on

and

off.

If

the

minimum

aperture

of

the

lens

is

equal

to

or

smaller

than

the

flashing

aperture,

exposure

will

be

correct.

If

larger.

the

image

will

be

overexposed.

lf,

with

Speedlite

199.4,

you

want

to

use

a

shutter

speed

of

1/30

sec.

or

slower,

set

the

AE

mode

selector

to

To

and

the

AT

dial

to

the

desired

shutter

speed

and

set

the

shutter

speed

selector

switch

on

the

199A

to

(he

MANU

position.

In

this

case,

the

shutter

speed

on

the

AT

dial

will

be

displayed

in

the

readout.

6

0

F

2.H

2.

Automatic

Flash

Control

with

Canon

Speedlitcs

I55A

or

199A

The

fl

ash

is

on

Auto

but

the

aperture

is

manually

set

by

turning

the

lens

aperture

ring.

This

type

of

automatic

fl

ash

control

is

necessary

with

an

FL

lens

and

other

non

-FD

lenses

and

possible

with

an

FD

lens

when

it

is

not

set

to

"A".

-85-

Canon A-1 Instruction Manual - Page 77

Digital, Readout, Flash, Photography

Page 77 highlights