Olympus 77AF Instructions Manual

INSTRUCTIONS

Thank

you for

purchasing

the

Olympus

OM77AF.

The

OM77AF

is a

fully

automatic

SLR
camera which incorporates the very latest in photographic technology in an incredibly
compact form. Autofocus, programmed exposure modes and an optional Power Flash
Grip 300 all facilitate problem-free photography. In addition, connected to a Full­Synchro Flash F280, the world's first flash unit capable of synchronizing with any
shutter

speed

up to

1/2000

sec.,

the

OM77AF

offers

the

user a simple,

error-free

method

of

attaining

professional-level results

in

areas

such a fill-in

flash

photography.

Before using

the

camera,

please

study

this

instruction

manual

carefully

with

the

OM77AF

in front of you, so that you can get the very best performance and service life from your
new camera.

The following symbols are used during explanation of operating procedures.

Correct

Incorrect

Operation

Operation order

Automatic
operation

Attention

Press lightly

Lamp on

Lamp blinking

1

Table of Contents

Preparations before Taking Pictures

........

3

• Loading the Power Flash Grip 300
Batteries

......................

4

• Loading the Power Grip 100 Batteries

.....

7

•

Mounting an AF

Lens

.............. 9

Taking Photographs

I

................11

•

Turning on the

Power

..............

12

•

Loading the

Film ................

13

•

Taking Photographs

.............. 16

•

Rewinding the Film

...............

20

Taking Photographs

II

................

22

• Taking a Continuous Series of Shots

....

23

•

Using

the

Power Focus

............ 24

•

Using

the

Program

Shift

............ 27

•

Using

the

Focus

Lock System

........ 30

•

Using the

AE Lock ............... 32

•

Using the

Reset

Button ............

34

•

Using the Self-Timer ............... 35

•

Using an OM Lens

................. 37

Taking Photographs

III

.............. 40

•

Using

the

Power

Flash

Grip

300

....... 41

• Using the Full-Synchro Flash F280

......

44

• Using the T20 and T32 Electronic

Flashes

...................... 48

•

Using a Conventional Auto

Flash

....... 51

To

Take Better Photographs

........... 54

•

Autofocus (AF) .................

55

•

Program .....................

57

• TTL Direct "OTF" Light Metering

.......

63

•

Viewfinder Display

...............

64

• LCD

Panel .....................

65

• OM Lenses

.................... 66

• OM AF System

.................. 67

•

Notes

on

Using

the

OM77AF with Previous

OM System Units

................ 68

Handling

Care

.................... 69

Storage

Care

.................... 70

Questions

and

Answers

.............. 71

Description

of

Controls

.............. 73

Main Specifications

of the

OM77AF

.......

76

Main Specifications of Power Grip 100

.......

78
Main Specifications of Power Flash
Grip

300

.......................

78

2

Preparations before Taking Pictures

3

Loading the Power Flash Grip 300 Batteries

Remove the battery cover on the bottom of the

grip.

Do not use different types of batteries, or new and old batteries at the same time. Remove the
batteries if you are not likely to use the camera for a long time.

1

4

2

Insert the batteries in the correct directions and

replace the cover.

To remove the grip, slide the grip lock knob and
push down on the grip.

4 LR03 (AAA) batteries

5

and and then push up until it locks.

Note: Slide the power switch OFF when loading batteries or replacing the grip.

6

To replace the grip, align with the indicators

Remove the battery cover on the bottom of the

grip.

Loading the Power Grip 100 Batteries

1

2

Insert the batteries in the correct directions and

replace the cover.

7

4 LR03 (AAA) batteries

To remove the grip, slide the grip lock knob and
push down on the grip.

To replace the grip, align with the indicators
and and then push up until it locks.

8

Mounting an AF Lens

To mount an OM lens, refer to page 37.

Remove the rear lens cap and the body cap.

1

9

2

3

it locks. Do not touch the lens release button

when mounting the lens.

Remove the front lens cap.

Removing the Lens:

Press the lens release button and turn the lens

counterclockwise.

10

Align the red dots and slowly rotate the lens until

Taking Photographs I

With autofocus and programmed exposure, the OM77AF puts the fascinating world of SLR
photography at your fingertips; a perfect shot is only a press of the shutter release away.

11

Turning on the power

Slide the power switch ON.

1

Film speed and battery condition are shown for

1.5 sec.

OK

Battery power below 50 %

Change the batteries.

When power is switched ON, the lens is set to and all functions reset (see page 28).

12

Loading the Film

Loading

and

film-speed

selection

for DX

film

are

automatic.

Use only lSO 100 when using non-

DX film.

Make sure film is DX type.

To open the back, press the locking button and

slide the release knob.

2

1

13

3

Avoiding direct sunlight, insert the film cartridge.

Take care not to touch the shutter curtain with
your finger or the film leader.

4

5

Align the film leader with the mark and gear the
sprocket teeth to the film perforations.

Close the camera back and ....

14

The film is automatically wound on until the exposure counter
reads 1.

When the film is incorrectly loaded, blinks. Reload the film.

Film type confirmation is possible through the

window in the camera back.

15

Taking Photographs

Press the shutter release halfway to activate the

viewfinder display.

1

(The display continues for 30 sec.)

Frame your subject.

2

Do not touch the front-most part of the lens.

16

Place your subject in the center of the autofocus
frame.

3

Press the shutter release halfway to focus.

4

Under-exposure

warning:
blinks.

Over-exposure

warning:

blinks.

17

A green light indicates the subject is in focus. (A
red light indicates autofocus is not possible.)

5

Press down on the shutter release.

The

film

is

automatically

advanced

one

frame.

In poor light conditions, the autofocus illuminator

is automatically activated to determine the correct

distance. However, there are some cases depending

on the type of lenses used in which it cannot be
used. Even in these conditions the subject distance
can be determined when using the F280.

18

When battery power falls below 50 %, blinks after each shot, and charge time is increased
when using the Power Flash Grip 300; therefore, changing the batteries is recommended.

19

Rewinding the Film

1

Film rewind is also automatic.

Confirm that you have reached the end of the film.

R blinks.

While sliding locking knob , press the rewind
button .

2

20

On completion of rewind, the shutter is released, flashes and the
frame counter reads "0".

Open the camera back and remove the film.

The film is completely rewound into the cartridge.

3

21

Taking Photographs II

With a Continuous AF mode, and a Program Shift that lets you choose at any time to shift

within the program in an aperture or shutter-preferred manner, the OM77AF provides for the

expression of every photographic idea.

22

Taking a Continuous Series of Shots

Continuous

focusing

and

shooting

is

especially

useful

whan shooting moving

subjects.

As

soon
as the subject is in focus, the picture is taken and the film wound to the next frame. This
process Is repeated as long as the shutter release is held down.

Press

the

DRIVE

button

to

enter

the

mode.

Press the shutter release.

23

Using the Power Focus

Useful when autofocusing on a subject is difficult

. (Refer to page 51.)

Press

the

AF/PF

selection

button

to

enter

the

"PF" mode.

blinks.

Slide the shift knob.

1

2

24

Green LED in the viewfinder blinks during power­focusing.

When the knob is shifted to the right, the lens focuses on closer
subjects.

When

shifted to the

left,

the

lens

focuses

on

farther

subjects.

Be sure not to press the lens locking button while using the power focus as this will put the
camera into autofocus mode.

25

Light pressure: Fine adjustment.

Firm pressure: High speed adjustment.

When the subject within the focusing screen is in
focus, press the shutter release.

3

26

Using the Program Shift

Aperture and shutter speed can be set freely while maintaining correct exposure.

Press the AF/PF selection button to enter the AF

mode.

1

27

Slide the shift knob.

2

PROGRAM blinks.

Continue

pressure

on the

knob until

the

desired

shutter speed/aperture combination appears in the

viewfinder.

28

Light pressure: 1/2-stop shifts.

Firm pressure: Continuous change.

Shutter speed increases.

Shutter speed decreases.

Faster shutter speeds will stop action. Large apertures will keep your subject sharp and back-

ground out of focus. Smaller apertures will maximize sharpness throughout your picture.

29

Using the Focus Lock System

Press

the

button

to

enter

the

/SINGLE

mode.

1

2

Press

the shutter release lightly, making

sure

the

center subject is in focus (green LED lights).

30

3

While

pressing

the

shutter

release lightly,

change

the composition of the picture as you like.

Press

the

release fully to take

the

photograph.

4

31

Using the AE Lock

Useful for shooting against strong backlight. The AE and AF locks can be used together on the

same subject.

1

2

To eliminate extraneous light, approach the subject

so that it fills the viewfinder.

Press

the AE

lock

button.

32

3

While continuing to hold in the AE lock button,
change the composition of the photograph as

desired.

4

Still

holding

in the AE

lock

button,

press

the

shutter release.

Using the AE lock, the subject is properly exposed
no matter what the background lighting conditions.

33

Using the Reset Button

Press

the

reset button.

1. _ modes and any program shift will be cancelled and the mode set to PRO­GRAM,

/SINGLE.

2. The

lens

will

be

reset

to .

3. The ISO speed will be displayed. 4. The battery condition will be displayed.

34

Using the Self-Timer

The camera should be fixed firmly, for example, on a tripod.

Press

the

self-timer

button.

indicates

self-timer

activation.

Press

the

shutter

release lightly to focus

on

your

subject (green LED lights).

1

35

2

Press

the

shutter

release fully to start

the 12

sec.

self-timer.

blinks.

(The

shutter

will

fire

in 12

seconds

and the

self-timer

mode

will

be

released.)

To avoid incorrect exposure in the self-timer mode, ensure that strong light does not enter through the
viewfinder.
The self-timer can be cancelled by any of the following methods:

1.

Pressing

the

self-timer

button

again.

2.

Pressing

the

reset button. 3. Turning

the

power

OFF.

36

Using an OM Lens

The OM77AF

switches

to

aperture-preferred

auto

mode.

Autofocus

is not

available.

1

Align the red dots and rotate the lens until it locks.

Select either SINGLE mode (for single frame
winding) or mode (for continuous

winding).

2

37

3

Select an appropriate aperture.

Turn the focus ring to focus on the subject.

4

5

Compose the shot and press the shutter release.

38

6

To detach the lens, press the ribbed button on the
side of the lens and turn counter-clockwise until it

is free.

CAUTION: The lens cannot be removed by pressing the lens locking button on the camera's body.

In-Focus/Focus Impossible LED, shutter speed or aperture indication will not appear in the view-

finder, the self-timer will be inoperable and the Super FP Flash mode of the F280 will not be available.

39

Taking Photographs III (Flash Photography)

With

the

Power

Flash

Grip

300

mounted,

the

OM77AF

is the

world's

first

autofocus

SLR

with

a

built-in flash. When connected to the Full-Synchro Flash F280, the first electronic flash in the

world capable of synchronizing with all shutter speeds up to 1/2000 sec., it can be used in any

light

conditions

to

provide

for

simple

fill-in

flash

photography

at a

touch

of the

shutter

release.

40

Using the Power Flash Grip 300

Press the flash pop-up lever to release the flash and

begin charging.

1

2

back or the indicator in the viewfinder.

41

Check the charge indicator on the Power Grip's

Press the shutter release.

3

Check the flash indicators. will blink to indicate
correct exposure. does not appear if the subject
was underexposed.

4

42

Push in the flash reflector after use, and slide the

power switch OFF.

5

• Do not cover the flash reflector with your fingers.

• The flash area is sufficient for lenses as wide as 36 mm.

• The

flash

will

not

operate

at

speeds

greater

than

1/100

sec.,

or

before

completing

recharge.

• Charging stops when the power switch is turned OFF, or when the viewfinder display disappears.

(Refer to page 16.)

43

Using the Full-Synchro Flash F280

A fully synchronized flash that is useful for fill-in flash photography as well as at night.

Slide the F280 into the shoe and secure it with the

lock-screw.

44

1

2

Turn the power switch ON, and set the mode

switch to (OM-707/OM-77AF).

A Super FP or Normal "OTF" Flash will be selected
automatically depending on the subject brightness.

3

Check the charge indicator.

45

When in dark places, lights and the unit fires in the Normal "OTF" Flash mode.

In the Normal "OTF" Flash mode the working range is 1 m — 7 m (3.3 — 23 ft) (50 mm F1.8
lens). You should consult the flash instruction manual for full details.

Press the shutter release.

4

When in bright places, lights and the unit fires in the Super FP Flash mode.

46

5

Check the flash emission.

blinks to indicate correct exposure in the Normal "OTF" Flash mode.
turns off to indicate under-exposure.

In the Super FP Flash mode, blinks to confirm a Super FP Flash.

47

Using the T20 and T32 Electronic Flashes

Can be used In "OTF" AUTO flash mode.

1

Slide the unit into the shoe, secure it with the

lock-screw, and ensure that the calculator panel is

inserted

so

that "full automatic control by OM-2"

is displayed.

2

Turn the power switch ON.

48

3

Check the charge indicator.

lights

up and the

flash

will

fire

when a shutter

speed slower than 1/100 sec. is required.

The flash working distance varies according to the lens' maximum aperture and the shooting
environment.

49

4

Press

the

shutter

release button.

5

Check for correct exposure.

blinks to indicate correct exposure.

No indicates under-exposure.

50

Using a Conventional Auto Flash

Press the button to enter the mode. The
camera is set to f4 at 1/100 sec.

The mode is not available when using the
T20, T32, F280 or the Power Flash Grip 300.

1

51

2

Set the flash to work at f4.

Press

the

button

to

cancel

the

mode after use.
(Pressing the reset button also cancels the
mode.)

3

52

• Auto flash units without an "F4" mode cannot be used.

• If a

lens

with a maximum

aperture

smaller

than

f4 is

used,

slight

under-exposure

will

resuIt.

•

When

using a non-AF

OM

lens,

set the

aperture

to f4. The

shutter

will

be set at

1/100 sec.

53

To Take Better Photographs

The following pages are presented to assist those who wish to improve their photographic tech­nique. Please read them carefully, apply the techniques and expand your creative horizons.

54

Autofocus (AF)

TTL "Zero-In" System

An exceptionally accurate TTL "Zero-In" elec­tronic focusing system, which works on the princi-

ple that image discrepancy is zero when an object

is

correctly

focused,

is

employed

by the

OM77AF.

Light passing through the focus-mirror is passed

through

an

infrared

cut

filter, a correction

lens

and
then projected onto a CCD "Zero-In" sensor where
it is converted into electrical signals. Using these

signals to determine the image discrepancy, a CPU,

by reference to a lens-mounted ROM, calculates

the appropriate lens rotation and transfers this
information to an AF motor. This single calcula-

tion/focus correction sequence results in quick and

accurate focusing. Additionally, when the Power
flash Grip 300 is connected, the focus information
is used to provide precise distance information for
perfect flash-exposure control.

55

Subject difficult for autofocus

Although

the

OM77AF

can

focus

in

almost

any

situation, there are certain conditions, illustrated

below, in which it may be impossible to obtain
correct focus. A red LED in the viewfinder will

situations , and , the green LED in the

viewfinder may illuminate even though the lens is

incorrectly focused. In any of these situations, you

can try focusing on a subject at a similar distance

and then, using the Focus Lock (pages 30 — 31),

recompose your picture, or you can use the Power
Focus mode (pages 24 — 26) to focus manually.

Subject without vertical lines.
Subject without contrast.
Rapidly moving subjects.

Two subjects within the focusing frame at

different distances.

Excessively bright light at the center of the

focusing frame.

Subject with repeated pattern.

56

usually indicate these conditions, however, in

Program

The

OM77AF

programs

offer

the

optimum

balance

between aperture and shutter-speed settings to
enable quick response to every photographic op-

portunity. Also, the Auto Program Shift selects

automatically a program appropriate to the present
focal length of the mounted lens, while the Manual
Program Shift lets the user shift shutter speed and

aperture at any time and employ the program as an

aperture or shutter speed-preferred auto-exposure
program. These two functions combine to produce

a camera that can satisfy the demands of the begin­ner as easily as those of the more advanced SLR
user.

57

Shutter speed

(50 mm

F1.8)

Aperture

Auto Program Shift

The

OM77AF

has

been

programmed

to

automatical­ly select a program mode appropriate to the focal
length of the lens to be used. There are individual

programs for telephoto, standard and wide angle

lenses, with the capacity to automatically shift
programs in line with the focal length changes of
zoom lenses. In the wide-angle program mode

(Program chart ), for lenses below 35 mm, depth

of field is given priority. The standard program

mode (Program chart ) is used for lenses in the

90 mm and above, gives higher priority to the

shutter speeds needed to avoid camera shake.

58

Shutter speed

Aperture

35 — 89 mm focal-length range. The telephoto
program mode (Program chart ), for lenses of

Manual Program Shift

With

the

OM77AF,

the

photographer

is

free

to

select
a desired aperture or shutter speed with the assur­ance of a perfect exposure. For instance, when

using a 50 mm F1.8 AF lens, the initial setting of

aperture and shutter speed is in accordance with

the Standard Program (Program chart ). By using

the shift-knob, the photographer is free to shift the

program line by 1/2-stops to reach a desired shutter
speed or aperture. In this way, and with no need of

any physical adjustment, the program can be used

as an aperture or a shutter speed-preferred program,

depending on the photographer's intention.

59

Shutter speed

Aperture

Power Flash Grip 300

By using the Power Flash Grip 300, you are always
ready for problem-free flash photography. With the

flash reflector up, the unit will fire automatically

only when natural light requires a shutter speed of

1/100 sec. or slower. The shutter speed will be set

at 1/100 sec. in this case, and the aperture deter­mined by the AF CPU on the basis of the absolute
distance of the subject (Flashmatic method), as

illustrated by the dotted line in the chart.

60

(ISO

100)

Shutter speed

Aperture

Full-Synchro Flash F280

Combined

with

the

F280,

the

OM77AF

can syn-
chronize with the flash unit at all shutter speeds,
resulting in a flexible program that can cope with
fill-in flash photography as easily as it can

the more usual poor light situation. The aper-

ture is set at f4 (or if this is not available, the maxi-

mum aperture of the lens), and when natural light

requires a speed of 1/100 sec. or slower a Normal
"OTF" Flash is produced; when a higher speed is
required, a Super FP Flash is produced auto-

matically. After the shutter speed reaches 1/2000
sec., the aperture is adjusted to provide correct
exposure.

61

Shutter speed

Aperture

T-Series Flash

Combined with a T-Series flash (except the T-45),
the OM77AF can be used for a variety of advanced
flash techniques, bounce or diffused lighting for
example, while correct exposure is assured by the

camera's TTL Direct "OTF" program, which con-

trols the amount of light emitted in accordance

with the distance of the subject. When using a

T-Series Flash, the aperture is set at f4, the shutter
speed is set at 1/100 sec., and a flash fired only
when a shutter speed of 1/100 sec. or slower is
required.

62

Shutter speed

Aperture

TTL Direct "OTF" Light Metering
(Center-weighted, Averaged Light
Metering)

The

OM77AF

employs

the

famous

TTL

Direct

"OTF" (Off-The-Film) light metering system. An

Olympus first, this system which measures the light
as it falls on the film surface and controls the ex­posure accordingly, results in superbly accurate
automatic exposure even when there are sudden
changes in illumination during the exposure, or
when it is difficult to determine the light condi-

tions beforehand, as is the case in macro photo-

graphy. When a flash unit is employed, metering

requires no effort whatsoever, even when you
employ T-Series units for bounce or diffused-light
techniques. In addition, when combined with the

Full-Synchro Flash F280, the camera can make use
of speeds of up to 1/2000 sec. for perfectly
exposed all-condition shooting.

63

Viewfinder Display

Autofocus Frame

In-Focus/Focus Impossible LED:

Green LED: in-focus

Red LED: autofocus is not possible

Shutter Speed Indicator
Aperture Setting Indicator

Super FP Flash Indicator

Lights: charged

Blinks: to indicate use of Super FP Flash

Normal "OTF" Flash Indicator

Lights: charged

Blinks: correct Normal "OTF" exposure

Power-Focus Indicator

64

LCD Panel

The

OM77AF

employs a large

interactive

LCD

panel

that

can "reply"

to the

photographers

adjustments
with information on the camera's operating condi­tion. The following information is displayed at the

appropriate time:

Normal Flash mode display

Self-timer display

Power focus

Autofocus

Exposure mode

Battery condition

ISO speed

Exposure counter

Drive mode selected

65

OM Lenses

While designed for a new series of Olympus AF

lenses,

the

OM77AF

can be

used

with

non-AF

OM
lenses (although not in the AF mode), with the
result that most Zuiko lenses, from the Fisheye to

the tele-converters, can be mounted on the camera.
The

camera

will

automatically

select

the

aperture­preferred AUTO mode and a shutter speed appro­priate for the aperture selected by the photo-

grapher. This allows the user to vary depth of field

for a variety of creative effects: a small aperture
for a photograph in which everything is sharply
defined, or a large aperture which, by blurring the
back- and foreground, emphasizes the subject.
There is no viewfinder display for in-focus/focus

impossible, shutter speed or aperture when using

OM lenses.

66

OM AF System

OM AF System Lenses OM AF System Accessories

AF 50 mm F1.8 Full-Synchro Flash F280

AF 28 mm F2.8 Power Flash Grip 300
AF Zoom 35 - 70 mm F3.5 - 4.5 Power Grip 100
AF Zoom 28 - 85 mm F3.5 - 4.5* Dioptric Correction Lens 2 (with Eyecup)

AF Zoom 70 - 210 mm F3.5 - 4.5 Eyecup 2

AF Macro 50 mm F2.8* Recordata Back 100

AF 24 mm F2.8* TTL AUTO Cord F 0.6 m
AF Zoom 35 - 105 mm F3.5 - 4.5*

* Available in near future.

67

Notes on Using the

OM77AF

with Previous OM System Units

• Auto Extension Tube 7/14/25 and Telescopic Auto Extension Tube 65-116 can be used only with
OM lenses when autofocus is not available.

• When using the Telescopic Auto Extension Tube 65-116 the tripod mount should first be removed.

• The following units cannot be used:
The Zuiko Reflex 500 mm F8, Zuiko 600 mm F6.5, and Zuiko 1000 mm F11 lenses; all Motor
Drive Group units; the Auto Bellows, TTL Auto Cord T0.3/0.6/2/5 m, TTL Auto Multi Connector,
TTL Auto Connector T20, Slide Copier, Roll Film Stage and Trans-llluminator Base X-DE; the
Electronic Flash T45; Interchangeable Focusing Screens; Recordata Backs for other OM cameras;
Polarizing Filter POL; Filter R60 (R1).

• T10 Ring Flash 1, T8 Ring Flash 2 and Macro Flash Shoe Ring cannot be used in combination with

AF zoom lenses.

•

Olympus

Auto

Focus

lenses

are

exclusively

designed

for the

Olympus

OM77AF.

68

Handling Care

Take care in handling the camera.

Do not use extra force.

69

Storage Care

Battery Precautions

Guard against high temperatures and magnetic

field.

In case of malfunction, take the camera to your nearest Olympus

service station.

70

Questions and Answers

Q: What kind of batteries should I use?

A: Use four LR03 (AAA) alkaline manganese bat-

teries. Don't mix various kinds of batteries, or

install new with old. Change all batteries at one

time. The provided batteries are for testing

operation at the time of purchase.

Q: The camera does not work.

A: (1) Try sliding the power switch OFF and ON

again. (2) If the low battery indication remains
on even when the shutter release is pressed half­way, the camera will not work.

Q: The lens moves to infinity after it is mounted

on the body.

A: The

lens

is

automatically

reset

to infinity

for

coordination of lens control. If the lens is not

reset, press the reset button or turn the power

switch OFF and ON again.

Q: Why doesn't the camera focus on the image?

A: The camera may not focus in some cases. Focus-

ing is difficult when, for example, the subject
is moving quickly, the camera is being violently
shaken, or the subject is of a kind difficult to

focus on (see "Subject difficult for autofocus",

page 56).

Q: The indicators in the viewfinder disappear while

shooting.

A: They automatically disappear after appearing

for 30 seconds, in order to save battery power.
To re-display them, lightly touch the shutter

release button.

Q: The AF illuminator lights, but the camera does

not focus.

A: It may not focus even when the subject is close,

if the subject reflects little light (as when

colored blue or black).

Q: Can the front-most ring be manually rotated?

A: Do not forcibly turn it. This may damage an

inside gear, and the flash control may not

operate. If you happen to move it, press the

reset button to move the Iens back to .

Q: Why won't the shutter fire when I press the

release button?

A: It is probably unfocused. Check the LED in the

viewfinder. Also, it may be out of film. Or the

batteries may be exhausted.

Q: The lens locking button is pressed while shoot-

ing.

A: If this button is fully pressed, resetting may

occur. So be careful.

Q: The Power Flash Grip 300 does not recharge.

A: Are the batteries exhausted? Press the reset

button to check the batteries. Also note that
the flash unit cannot be recharged during auto

focusing, winding, and exposure.

71

Q: Why doesn't the flash fire?

A: There are two possible reasons. (1) Flash firing

is automatically inhibited at shutter speeds
faster than 1/100 sec. (when using T-series

flashes and the Power Flash Grip 300). (2) Are

you trying to fire before the unit has been
recharged?

Q: When should I check the batteries?

A: (1) When new batteries are inserted. (2) After

the camera has not been used for a long time.
(3) Before beginning a prolonged period of use.

(4) When it is very cold.

Q: In the finished print, a peripheral portion of the

picture is cut, though I framed it inside the

viewfinder.

A: In some color prints and color slides, a periph-

eral portion of the picture may be eliminated in
the laboratory. It is recommended, therefore,
to leave some margin in composing your picture.

Q: How do I clean the lens?

A: Use a soft, clean, cotton cloth (preferably a

washed one) and a small quantity of pure
alcohol. Slowly wipe the lens with a spiral
motion, from the center outward.

Q: How do I clean the camera?

A: Dust, moisture, and salty air are harmful to

cameras and lenses. Wipe the camera surfaces
clean and let dry after using it in rain or mist.

When used near the sea, wipe it off with a

cloth moistened with clean water, then clean

and store it.

Q: Why are there sometimes scratches on the

film?

A: The cause may be a soiled film passage. The

film compartment may be soiled by film debris

during long use of the camera. Be sure to dust

off the camera periodically.

Q: How can I preserve the camera in a humid

environment, and prevent the growth of

mildew on it?

A: Take it out of the case and store it in a poly-

ethylene bag, together with a dessicant such as

silica gel. However, do not use a dessicant that
includes insecticide.

Other cautions

• When other companies' lenses are used, correct
exposure may not be obtained or they may cause

malfunctioning, so do not use them.

• This camera cannot be used for infrared photo­graphy.

72

Description of Controls

1. Pop-Up Flash

6. Autofocus Illuminator

5. Rubber Grip Section

2. Power Flash Grip
300

3. Grip Lock Knob

4. Lens Locking Button

73

7. Self-Timer Button

17. Flash Pop-Up Lever

8. AF/PF Switching Button

16. Shoulder Strap Eyelet

15. Reset Button

14. Shutter Release Button

11. Hot Shoe

13. Main ON/OFF Switch

12. LCD Panel

10. F4 Mode Button

9. Single/Continuous Switching

Button

74

19. Camera Back
Release Locking

Button

20. Eyepiece

21. AE Lock Button

22. Shift Knob (Power Focus/Program Shift)

18. Camera Back
Release Knob

23. Film Window

24. Tripod Socket

25. Rewind Button

26. Rewind Locking Knob

75

76

Main Specifications of the OM77AF

Type: Autofocus, auto-exposure 35mm SLR

camera.

Film format: 24 x 36 mm.
Lens mount: Olympus OM mount (designed for

AF lenses).

Lens: (1) Olympus AF lenses. (2) OM lenses.

Shutter: Electronically controlled vertical-travel

focal-plane shutter. Shutter speed: 2 — 1/2000

sec.

Synchronization: Hot shoe: Super FP Flash con-

tact; X contact; T-Series Flash contact.

Autofocus: Method: TTL phase detection system

with CCD Zero-In sensor.

Focusing sensitivity range: EV 4 — 18 (ISO 100).
Actuation method: Single or continuous. Focus
lock possible.

Indication: Single-point 2 color LED in view­finder; focused: green lamp; autofocus impos-

sible: red lamp.

AF illuminator: Automatic actuation in low light.
Manual focus: Olympus AF lenses: By shift knob,

OM lens: By focus ring.

Light metering method: Exposure control: TTL

Direct "OTF" Metering (center-weighted,
average light measurement).

Exposure modes: Multi-program: (1) Program.

(2) Program shift by shift/power focus knob.
(3) Automatic program shift based on focal

length of lens. (4) Aperture preferred AE when

using OM lens.

Program auto-exposure: Type: Electronic shutter

with automatic control of shutter speed and
aperture.
Light measuring range: EV 1 — 20 (ISO 100

AF 50mm F1.8).

AE lock: By AE-lock button.
Flash control: Full-Synchro Flash F280: Auto-

matic selection of Normal "OTF" Flash or

Super FP Flash.
Power Flash Grip 300: Flashmatic.
T-Series Flash: TTL Direct "OTF" flash.

Regular flash units: Normal Auto flash with

F4 mode.

Automatic film speed setting: Automatic setting

for film with DX code; Range: ISO 25 — 3200.

Viewfinder: Focusing screen: Fixed, Super Lumi-

Micron Matte with autofocus frame.
Finder view-field: 93 % of actual picture field.
Magnification: 0.8X

at infinity with 50 mm

standard lens.

77

Viewfinder information: Type: LCD display, back

illumination by LED.
Contents: (1) Focus display. (2) Shutter speed/
Aperture display. (3) Over/Under exposure

warning. (4) Flash display. (5) Power focus dis­play.

Display limiter: Approx. 30 sec.

LCD panel information: Various mode informa-

tion in large LCD panel.

Film loading: Auto-loading (automatically wound

to first frame).

Film wind: Automatic wind; Single/Continuous

switchable.
Max. wind speed: approx. 1.5 frames per sec.

Automatically stopped at film end.

Battery life: With Power Flash Grip 300: 8 rolls

or more (using flash for 50 % of exposures).
With Power Grip 100: 25 rolls or more.
Using LR03 (AAA) (alkaline manganese) bat­teries, normal temperatures, 24EX film.

Exposure counter: Progressive type, displayed on

LCD panel.

Film rewind: Automatic rewind with rewind but-

ton. Automatic stop at film end.

Self-timer: 12 sec. delay electronic self-timer.
Power source: Supplied by Power Flash Grip 300

or Power Grip 100; Four LR03 (AAA) alkaline

manganese batteries.

Battery check: 3-step display in LCD panel.

Data hold: Static memory for necessary functions.

Dimensions: 141(W) x 89(H) x 52(D) mm (5.55"

x 3.50" x 2.05") (without grip).

Weight: 555 g (19.6 oz.) (without grip).

78

Main Specifications of Power Grip 100

System application: OM77AF

Type: Separable power-source grip.

Power switch: After mounting, controlled by

camera's power switch.

Shutter release: Electromagnetic shutter release for

OM77AF.

Battery life: Sufficient for 25 rolls or more

(alkaline-manganese, normal temperatures, 24

Ex. film).

Camera mount: Exclusive slide-bayonet mount.

Electrical connection with camera: Cordless, direct-

contact.

Power source: LR03 (AAA) alkaline-manganese

battery x 4.

Facing: Rubber pad.

Dimensions: 35(W) x 64(H) x 61(D) mm (1.4" x

2.5" x 2.4") increases camera width by 5.7 mm
(0.2").

Weight: 43 g (1.5 oz.) without batteries.

Main Specifications of Power Flash

Grip 300

System application: OM77AF

Type: Separable power-source grip with built-in

flash.

Power switch: After mounting, controlled by

camera's power switch.

Shutter release: Electromagnetic shutter release for

OM77AF.

Battery life: Sufficient for 8 rolls or more (using

flash for 50 % of exposures, alkaline-manga-

nese, normal temperatures, 24 Ex. film).

Camera mount: Exclusive slide-bayonet mount.

Electrical connection with camera: Cordless, direct-

contact.

Guide number: 12 (ISO 100, meters).
Exposure control: Flashmatic.

Coverage angle: Equivalent to angle of view of

35 mm lens.

Recycling time: 4 sec. with LR03 (AAA) alkaline-

manganese batteries.

Flash duration: Approx. 1 /2000 sec.
Flash power-source switch: Power ON: pop-up

lever, Power OFF: flash reflector pushed in.

Power source: LR03 (AAA) alkaline-manganese

battery x 4.

Facing: Rubber pad.

Dimensions: 49(W) x 64(H) x 67(D) mm (1.9" x

2.5" x 2.6") increases camera width by 19 mm
(0.7").

Weight: 80 g (2.8 oz.) without batteries.

Specifications subject to change without notice.

OLYMPUS OPTICAL CO.,LTD.

San-Ei Building, 22-2, Nishi Shinjuku 1-chome, Shinjuku-ku, Tokyo, Japan. Tel. [phone]

OLYMPUS CORPORATION

Crossways Park, Woodbury, New York 11797, U.S.A. Tel. [phone]

OLYMPUS OPTICAL CO. (EUROPA) GMBH

Postfach 104908, Wendenstrasse 14-16, 2000 Hamburg 1, West Germany. Tel: [phone]

OLYMPUS OPTICAL CO. (U.K.) LTD.

2-8 Honduras Street, London EC1Y OTX, England. Tel. [phone]

PRINTED IN JAPAN 1186-15MS