INSTRUCTIONS
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Thank you for purchasing the OLYMPUS OM-4T . This new SLR camera employs
titanium — a metal lighter and 6 times stronger than aluminum — in the construction
of the main part of the body. It is the world's first 35 mm single lens reflex camera
equipped with Multi Spot Metering and our new Full Synchro Flash System.
This camera has been designed to facilitate serious photography with professional-
level techniques including daylight synchro-flash photography, all with a minimum
of effort: Its aim is to expand the sphere of creative photography. We recommend
that before using the camera, you read this instruction manual carefully, confirming
the instructions on the camera so that you can get the very best performance and
service lifefrom your newcamera.
Note: All the components of the Olympus OM-4T are carefully designed and their production and
assembly is strictly controlled to enhance the unmatched performance of the system. If any inter-
changeable lenses, flashes, or accessories other than Olympus products are used, Olympus cannot
be responsible for poor results or damage of the OM-4T .
Automatic
operation
Operation order
Lamp blinking
Two-step operation
Correct
Operation
Incorrect
Intermittent
sound
Continuous
sound
Reference
Attention
Lamp on
Press lightly
1
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TABLE OF CONTENTS
< Taking Photographs (V) >
— Flash Photography —
< Preparations before Taking Pictures >
Dioptric Correction . . . . . . . . . . . . . . .
Mounting the Lens . . . . . . . . . . . . . . . .
Loading the Batteries . . . . . . . . . . . . . .
Checking the Batteries . . . . . . . . . . . . . .
4
6
8
9
Taking Daylight Synchro-Flash Photographs
(Super FP Flash Mode) . . . . . . . . . . . . 50
< Other Operations >
Using the Self-Timer . . . . . . . . . . . . . . . 55
Exposure Compensation . . . . . . . . . . . . . 56
Bulb Exposure . . . . . . . . . . . . . . . . . . 57
How to Shoot when the Batteries
are Exhausted . . . . . . . . . . . . . . . . . . 58
UsingtheViewfinderIlluminator. . . . . . . 60
How to Turn Off the Beeper . . . . . . . . . . 61
Changing the Focusing Screen . . . . . . . . . 62
ChangingtheCameraBack. . . . . . . . . . . 64
Attaching the Grip . . . . . . . . . . . . . . . . 65
Handling Care . . . . . . . . . . . . . . . . . . . 66
Description of Controls . . . . . . . . . . . . . 68
Specifications. . . . . . . . . . . . . . . . . . . 72
Loading the Film . . . . . . . . . . . . . . . . . 11
Setting the ISO Film Speed . . . . . . . . . . . 15
< Taking Photographs (I) >
—AutomaticExposure—
TTL Direct Light Metering . . . . . . . . . . . 18
Rewinding the Film . . . . . . . . . . . . . . . 22
< Taking Photographs (II) >
—AutomaticExposure—
How to Use the Spot Measurement ...... 25
How to Clear the Spot Metering ........ 28
How to Use the "Multi-Spot Measurement"
Mode . . . . . . . . . . . . . . . . . . . . . . . 29
Highlight Control . . . . . . . . . . . . . . . . . 32
Shadow Control . . . . . . . . . . . . . . . . . 35
< Taking Photographs (III) >
—AutomaticExposure—
How to Use the Exposure Memory
Lock System . . . . . . . . . . . . . . . . . . 39
< Taking Photographs (IV) >
—Manual Exposure—
How to Take Picture on Center-
Weighted, Averaged Metering ......... 44
How to Use the Spot Measurement ...... 46
2
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< Preparations before Taking Pictures >
3
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Dioptric Correction
The OM-4T permits dioptric adjustment according to your eyesight.
Remove the body cap.
4
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Pull out the diopter adjustment knob.
Turn and adjust the knob so that the matscreen
appears sharp.
Push the knob back in until it locks.
5
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Mounting the Lens
Remove the rear lens cap.
Align the red dots and rotate the lens clock-
wise until it locks.
6
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Remove the front lens cap. (Press in the mount
tabs on the edges of the lens cap parallel with
"OLYMPUS").
Removing the Lens:
Press the lens release button and turn the lens
counter-clockwise.
7
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Loading the Batteries
Do not use different types of batteries or new and old batteries at the same time. If you are not
likely to use the camera for a long period of time, remove the batteries before putting it away.
Remove the battery cover.
8
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Wipe battery surfaces clean. Make sure that +
signs are facing upwards.
Checking the Batteries
Always check the batteries after inserting new batteries, when shooting in cold weather, or if the
camera has not been used for a long time.
9
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Rotate the mode selector dial to the "BATTERY
CHECK" position.
The audible and visual signals will tell you that
the batteries have enough power. As the battery
power weakens, the signals will become intermittent
then vanish completely when they are exhausted.
Replace the batteries.
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10
After the check, set back the dial.
When checking the batteries, the audible and visual signals will automatically turn off in 30
seconds. If you then press the shutter release, the shutter will trip in the auto exposure mode.
Loading the Film
11
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Pull up on the rewind knob to open the camera
back.
Tear off the top of the film box and insert it
into the memo holder. It will remind you which film
you are using.
Insert the cartridge and push down the film re-
wind knob. (Always load the film in the shade.)
12
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Insert the film leader into the take-up spool.
Wind the film and make sure the sprocket teeth
catch both the upper and lower film perforations.
Take up the slack by turning the rewind crank
clockwise.
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13
Close the camera back until it clicks into place.
Face the camera toward light and take two
blind shots. This will bring the film to thefirstframe.
14
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Setting the ISO Film Speed
Lift up the outer collar and rotate until the
ISO speed appears in the window.
Film speed
15
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Align the exposure line A with the index B .
If the exposure compensation dial does not turn to the
desired ISO number, set it once at an intermediate value then
repeat the procedure.
16
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< Taking Photographs (I) >
— Automatic Exposure —
The OM-4T enables aperture-preferred automatic exposure on TTL direct light metering
(center-weighted, averaged light metering). This mode can be used for most of the subjects
under normal conditions — when shooting with the sun behind you, when the subject
contrast is not too strong, and so forth.
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1
.
7
TTL Direct Light Metering
Aperture-preferred automatic exposure allows you to take pictures by utilizing the lens depth of
field effect (blurred background, for example).
P.95
Set the mode selector lever to the "AUTO"
position.
18
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Reference
P. 117
Set the aperture.
Basic aperture settings;
Press the shutter release lightly to activate the
viewfinder display.
The bar tip indicates the shutter speed.
19
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Focus on your subject.
Press the shutter release to take the picture.
A built-in battery conserver turns off the viewfinder dis-
play after 120 sec.
20
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If you see an overexposure warning signal
("OVER" blinks), set the aperture to a larger number.
If the shutter speed is too slow, set the aperture
to smaller number to prevent camera shake.
21
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Rewinding the Film
When the exposure counter indicates the end
of your roll of film.
Push the "R" button.
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22
Fold out the rewind crank and wind it until
the film tension is released.
Open the camera back by pulling up on the
rewind knob and remove the film.
23
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Taking Photographs (II)
—AutomaticExposure—
The spot metering system of the OM-4T enables you to control the exposure as you like. It
insures perfect exposure of backlighted and high contrast subjects and expands shooting
possibilities in the auto mode for more creative photography.
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24
How to Use the Spot Measurement
Reference
P. 96-100
Align the microprism area with the area
you want to measure. (The spot metering range is
outlined by the outer edge of the microprism.)
Spot metering range
25
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Press the spot button to take meter reading.
You will hear an electronic sound and the word
"SPOT" will appear in the viewfinder. The metered
value is displayed by the
mark.
If you shift the camera, another mark will indicate the exposure value in the center of
the frame along with the spot metered value.
26
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Press the shutter release to take the picture.
The subject will turn out correctly exposed,
regardless of the brightness of the background.
The spot metering mode will be automatically cleared after the shutter has tripped, or after
120 seconds have passed, and it will return to the, TTL direct light metering mode.
27
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How to Clear the Spot Metering
With the lever at "CLEAR", the mode will
return to TTL direct light metering.
"SPOT" and
markdisappear.
28
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How to Use the "Multi-Spot Measurement" Mode
Reference
P.101-104
Spot metering is possible in up to 8 spots.
This sample photo shows a backlighted subject.
29
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Take spot metering on the face (first spot).
Take spot metering on the ship in the back-
ground (second spot).
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30
Compose your picture and press the shutter
release.
Both the subject and the background are
correctly exposed.
To cancel the metered value, operate the clear lever.
31
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Highlight Control
Reference
P. 105-106
If you want to render white objects in white...
In ordinary shooting, white objects will turn
out grayish if the picture is taken in strong
brightness over the entire frame..
32
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Take spot metering on the part of the subject
which you want to render in white.
Press the HI. LIGHT button.
Exposure will be automatically corrected to give 2-step
overexposure.
33
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Press the shutter release to take the picture.
The white object turns out white.
The highlight control is cleared by pressing the HI. LIGHT
button once again. To cancel the metered value, use the clear
lever.
34
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Shadow Control
Reference
P. 107-108
If you want to render black objetcts in black...
In ordinary shooting, black objects will turn
out grayish if it is very dark over the entire picture
frame.
35
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Take spot metering on the spot which you want
to render in black.
Press the SHADOW button.
Exposure will be automatically corrected to give 2 2/3-
step underexposure.
36
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Press the shutter release to take the picture.
The black object turns out black.
The shadow control is cleared by pressing the SHADOW
button once again. To cancel the metered value, use the clear
lever.
37
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Taking Photographs (III)
—Automatic Exposure—
In automatic exposure, the same picture will be exposed with a very different exposure
value if it is taken in different backgrounds. The OM-4T has an exposure memory lock
system to solve this problem. It can be used in both the TTL direct metering and spot
metering modes. Once an exposure value stored in memory, it does not vary even if you
change the aperture (or shutter speed).
38
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How to Use the Exposure Memory Lock System
Reference
P. 109-110
The memory lock system is convenient for taking many pictures of the same subject in different
backgrounds or costumes.
Operate the lever to set up the memory mode.
The letters "MEMO" will appear in the viewfinder
and the memory signal will blink twice.
39
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Frame the composition as you desire.
The Exposure Value is Stored in Memory after
Shooting.
40
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The memory will keep on for 60 minutes after the shutter
has tripped.
Change the composition and shoot.
The subject is exposed with the same exposure
value even if you change the composition.
41
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To clear the memory, use the clear lever.
The memory is also cleared in the following cases:
1. When a lens is mounted or dismounted.
2. When the mode lever is switched.
42
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Taking Photographs (IV)
— Manual Exposure—
The OM-4T permits manual exposure on center-weighted, averaged metering and spot
metering. It allows you to choose the optimum aperture and shutter speed which suit your
subject and taste.
43
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How to Take Pictures on Center-Weighted, Averaged Metering
Set the mode selector dial to the "MANUAL"
position.
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44
Set the bar graph tip to the fixed point between
the arrows by adjusting the aperture and/or shutter
speed rings.
Fixed point
The shutter speed you have set will be displayed
in the viewfinder.
Shoot.
45
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How to Use the Spot Measurement
Reference
P.96-100
Align the microprism area with the area you
want to measure.
Spot metering range
46
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Press the spot button to take meter reading.
Set the bar graph tip to the fixed point between
the arrows by adjusting the aperture and/or shutter
speed rings.
The shutter speed you have set will be displayed
in the viewfinder.
47
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Shoot.
The subject will turn out correctly exposed,
regardless of the brightness of the background.
It is also possible to use the multi-spot metering, highlight control and shadow control. In any
case, correct exposure is obtained by simply setting the bar graph at the fixed point.
48
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< Taking Photographs (V) >
— Flash Photography —
The OM-4T is the perfect companion for the world's first Full Synchro Flash F280. Profes-
sional standards are within the reach of every owner, even during daylight synchro — flash
photography — an area which has traditionally required considerable skill.
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49
Taking Daylight Synchro-Flash Photographs (Super FP Flash Mode)
For OTF Auto using the Normal OTF Flash mode, refer to the F280 instruction manual.
Slide the F280 into the accessory shoe and
secure it with the lock screw.
50
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Turn the power switch ON.
Check the charge indicator.
Set the mode switch to SUPER FP.
51
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Set the camera mode to AUTO.
Select an aperture that results in a shutter speed
faster than 1/60 sec. (for slower speeds consult the
F280 manual).
52
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Press the shutter release.
Confirm a correct exposure by checking the
indicator.
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53
< Other Operations >
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5
.
4
Using the Self-Timer
Push the lever down outward.
Press the shutter release to start the self-timer.
The shutter will fire in 12 seconds.
The shutter will trip immediately if the self-timer lever is returned while it is running.
55
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Exposure Compensation
Reference
P. 116
When an exposure compensation is set, the
indicator lights in the viewfinder.
After shooting, return the dial to its original
position.
56
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Bulb Exposure
Reference
P. 120
While pressing the "B" lock button, turn and
set the shutter speed dial to "B".
The display in the view finder disappears.
57
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The shutter will remain open as long as the shut-
ter release button is held depressed.
How to Shoot when the Batteries are Exhausted
If the batteries are exhausted and you do want to take pictures immediately, use the mechanical
shutter speed of 1/60 sec.
58
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While pressing the "B" lock button, rotate
the shutter ring to the red "60" position.
Shoot. The mechanical shutter will operate to
tripat1/60sec.
You cannot use the motor drive, winders and flashes
with the mechanical shutter.
59
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Using the Viewfinder Illuminator
Push the button if the viewfinder display is
too dark to read.
60
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How to Turn Off the Beeper
To turn off the audible signal, push the lever to
the right (in the direction of the arrow).
You will no longer hear PCV sounds when turning on the spot metering, highlight and shadow
controls, when operating the memory/clear lever, checking the batteries, or when mounting and
dismounting the lens.
61
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Changing the Focusing Screen
Reference
P.139-140
14 screens are available to cover a wide range of applications.
Pull down the screen frame.
Pull the lug at top inside the body mount toward
you to swing down the screen frame.
62
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To change the focusing screen, use the tweezers
supplied with an optional focusing screen. Push the
frame upward until you hear
a
click.
63
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Changing the Camera Back
The camera back is interchangeable with the Recordata Back or 250 Film Back.
P. 133
Open the camera back. Press down on the
camera back release button and remove the cam-
era back.
Removing
Attaching
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6
.
4
Attaching the Grip
Attach the Camera Grip 1 (optional accessory).
When using a motor drive or winders, detach
the Grip.
65
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Handling Care
Do not use extra force.
Take care in handling the camera.
66
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Storage Care
Battery Precaution
Guard against high temperatura and magnetic fields.
67
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Description of Controls
1 Finder Light Window
6 TTL Auto Cord Socket
7 Shoulder Strap Eyelet
2 CLEAR/MEMORY
Lever
3 Self-Timer/
Electronic
Beeper Muffling
Lever
8 Lens
9 Lens Release Button
10 Depth of Field Scale
4 Grip Lock Screw
11 Aperture Ring
12 Focusing Ring
5 Self-Timer/Battery Check Signal
68
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13 Automatic Clear Button
14 Accessory Shoe
22 HI. LIGHT Button
23 Viewfinder Illumination Button
24 MEMORY Indicator Lamp
25 SPOT Button
15 Manual Shutter Speed Ring
16 Rewind Crank
17 Rewind Knob/
Camera Back
Release
26 Shutter Release Button
27 Exposure
Counter
18 Film Speed
Dial/Exposure
Compensation Dial
28 Rewind Release Button
29 Film Advance Lever
19 ISO/ASA Film Speed
Window
20 Mode Selector Lever
30 SHADOW Button
31 Flash Control Contact
32 X Contact
21 Dioptric Adjustment Knob
33 Super FP Contact
69
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38 Sprocket
34 Viewfinder Eyepiece Frame
35 Film Rewind Shaft
39 Film Take-up Spool
40 Camera Back Release Pin
41 Camera Back
42 Pressure Plate
43 Film Cartrige Pressure Spring
45 Recordata Back Contact
36 Film Chamber
37 Film Guide Pins
44 Shutter Curtain
70
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46 B Lock Button
52 Lens Mount Ring
47 Flash Synchronization Socket
53 Motor Guide Pin Hole
48 Tripod Socket
49 Motor Coupling Terminals
50 Motor Coupling Socket
51 Battery Chamber
71
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Specifications
Type: TTL auto-exposure 35mm SLR camera
Film Format: 24mm x 36mm
Film-advance: Film advance lever with 130° angle for one long or several short
strokes and pre-advance angle 30°; motor drive and winder usable
Lens mount: Olympus OM mount
Film rewind: Rewind crank (motorized rewind with Motor Drive 2 possible)
Viewfinder: Viewfinder with dioptric correction; dioptric correction range
Shutter: Electronically controlled cloth focal plane shutter; 1/2000 sec. max.
shutter speed; 1/60 sec. mechanical shutter speed
+1.0
~
-3.0 diopters; interchangeable focusing screens; microprism/split
Synchronization:
slower); Super FP Flash contact; Hot shoe (with
contacts); 5-pin connector for T-series flash, synchro socket for
X
contact (synchronization at speeds of 1/60 sec. or
image-matte type screen standardized; finder view field: 97% of actual
X
and Super FP Flash
picture field; magnification: 0.84X at infinity with -0.5 diop. and 50mm
lens
X
Light measuring method: Center-weighted, average light measurement,
switchable to spot measurement; spot measurement selective in 3 modes;
multi-spot, highlight-and shadow-based methods.
Viewfinder information: LCD multi-mode display (2-min. limiter); built-in
illuminator, (10-sec, limiter)
Self-timer: 12-sec. delay electronic self-timer
Automatic exposure control by average light measurement: TTL Direct "off-
Battery check: 3-level display with LED and alarm sound; automatic lock
with batteries exhausted
the-film" Light Measuring with aperture-preferred electronic shutter;
exposure control range: about 1 min. ~1/2000 sec. light measuring range:
approx. EV-5 ~ EV19 (ISO 100, 50mm F1.4, normal temperature and
humidity); ±2 EV exposure compensation.
Power Source: Two 1.5V silver-oxide batteries SR44 (Eveready EPX-76;
alkaline manganese batteries LR44 or equivalent)
Camera back: Removable hinge type, with memo holder; interchangeable.
with Recordata Backs and 250 Film Back
Automatic exposure control by spot measurement: TTL spot metering
memory system (with AE lock); exposure control range: about 4 min. ~
Dimensions: 136 x 84 x 50mm (5.35" x 3.30" x 1.97") (body alone)
1/2000 sec. light measuring range: approx. EV 0 — EV 19 (ISO 100,
Weight: 510g (18 oz.) (body alone)
50mm F1.4, normal temperature and humidity); ±2 EV exposure compen-
sation.
Automatic exposure memory control: Exposure value memory system (60
min. limiter)
Manual exposure control: B,
1
sec.~1/2000 sec. mechanical exposure speed
1/60 sec.
Flash exposure control: Super FP Flash mode (when using the Full Synchro
Flash F280) "OTF" AUTO: Synchronizes with shutter speeds from 1/60
sec. to 1/2000 sec.; MANUAL: Synchronizes with all shutter speeds up to
1/2000 sec.; Normal "OTF" or Manual Flash mode (when using a T-series
Flash or Full Synchro Flash F280) Synchronizes with shutter speeds of
1/60 sec. and slower.
Film speed: ISO 6 ~ 3200
72
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OLYMPUS OPTICALCO., LTD.
San-Ei Building, 22-2, Nishi Shinjuku 1-chome, Shinjuku-ku Tokyo, Japan Tel. 03-340-2211
OLYMPUS CORPORATION
Crossways Park, Woodbury, New York 11797, U.S.A. Tel. 516-364-3000
OLYMPUS OPTICALCO.(EUROPA)GMBH
Postfach 104908, Wendenstrasse 14-16, 2 Hamburg 1, West Germany. Tel. 040-2-3773-0
OLYMPUS OPTICALCO. (UK.) LTD.
2-8 Honduras Street, London EC1Y OTX, England. Tel. 01-253-2772
73
PRINTED IN JAPAN 0786·3MS
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