Olympus OM40
posted 12-20-'02

This camera manual library is for reference and historical purposes, all rights reserved.
This page is copyright by , M. Butkus, NJ.
This page may not be sold or distributed without the expressed permission of the producer
I have no connection with Chinon Co., Japan

On-line camera manual library
This is the full text and images from the manual.

If you find this manual useful, how about a donation of $3 to:
M. Butkus, 29 Lake Ave., High Bridge, NJ 08829-1701
and send your e-mail address so I can thank you.

Most other places would charge you $7.50 for a electronic copy
or $18.00 for a hard to read Xerox copy.


This will help me to continue to host this site, buy new manuals, and pay their shipping costs. 
It'll make you feel better, won't it? 
If you use Pay Pal, use the link below. Use the above address for a check, M.O. or cash.

Back to main camera manual page


Thank you for choosing the Olympus OM-40 PROGRAM. This camera is equipped with a unique ESP (Electro-Selective Pattern) metering system. By combining this metering mode with the automatic film speed setting mode and programmed exposure mode, anyone can take perfectly exposed pictures with ease. Before using the camera, please read this operation manual carefully through while checking with your camera to become familiar with this versatile SLR.

Note: All the components of the Olympus OM-40 PROGRAM are carefully designed and their production and assembly is strictly controlled to enhance the unmatched performance of the system. If any interchangeable lenses, flashes, or accessories other than Olympus products are used, Olympus cannot be responsible for poor results or damage of the OM-40 PROGRAM.


< Preparations before Taking Pictures >

· Mounting the Lens - 11

· Loading the Batteries - 13

· Checking the Batteries - 14

·Setting the Camera for Automatic Film Speed Setting 15

· Loading the Film 16

< Taking photographs (I) >

Pictures with ESP Metering 204www.butkus.org

· Rewind the Film 23

 How to Take Programmed Automatic Exposure


< Taking Photographs (II) >

· How to Take Aperture-Preferred Automatic Exposure Pictures 26

· Manual Exposure 29

· Manual Film Speed Setting 31

· Exposure Compensation 33

< Other Operations >

· Using the Self-Timer 35

· Bulb Exposure 37



< Advanced Techniques >

· Selecting the Metering Mode

(A Choice of Two Metering Modes) 39

· Selecting the Metering Mode

(How to Use ESP Metering) 41

· Guide to Selection of Exposure Mode  46

· Selecting the Exposure Mode

--PROGRAM-- ..47

· Program Diagrams ..48

· Selecting the Exposure Mode

--AUTO (Aperture Preferred) - 52

· Depth of Field 52

· Preview Button 52

· Shutter Speeds 52

·Viewfinder Display for Automatic Exposure 54

· Selecting the Exposure Mode--MANUAL-- 55

· Combinations of Metering Mode and Exposure Mode  56

Selecting the Film Speed Setting Mode 57

· Bulb Exposure 59

· Multiple Exposure / Infrared Photography 60


· Flash Photography 62

· T-Series Flashes / Mounting the Flash 63

· How to Use T-Series Flashes 64

· Bounce Flash / Close-up Flash 65

· Using Electronic Flashes Other Than Olympus T-Series Units 66

· Shooting with Motor Drive 67

· Motor Drive Group Units 68

· Macrophotography 69

· Macrophoto Group Units 70

· Other System Units 71

< For Longer Service of Your Camera >

· Handling Care 73

· Storage Care 73

· Questions and Answers 75

· Description of Controls 79

· Specifications 82

<Preparations before Taking Pictures>

The Olympus OM-40 PROGRAM is basically designed for automatic film speed setting with

DX coded film.

Mounting the Lens

 Remove the rear lens cap.


 Remove the body cap.



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



Remove the front lens cap.4www.butkus.org


Removing the Lens:

Press the lens release button and turn the lens counter-clockwise


Loading the Batteries

Remove the battery cover. .


Wipe battery surfaces clean. Make sure that + signs are facing upwards.

(battery type - SR44 / LR44, very common type batteries.  About $2 each)

Checking the Batteries
After inserting the batteries, always check as follows:

Rotate the mode selector dial to the "BATTERY CHECK" position


If the sound becomes intermittent or the LED blinks, replace batteries.


Setting the Camera for Automatic Film Speed Setting

Make sure the film you are using is marked ""DX"". If the film you are using is not marked ""DX"" refer to page 31.4www.butkus.org


Set the film speed dial to


Loading the Film

Pull up on the rewind knob to open the camera back.


Place the film cartridge in the film chamber. (Always load film in the shade.}



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 clockwise4www.butkus.org



Close the camera back until it clicks into place.

Take two blank shots. This will bring the film to the first frame.

Checking the type of film:

The film check window in the camera back will allow you to check the type of film loaded in the camera.

< Taking Photographs (I) >

This chapter explains how to take programmed automatic exposure pictures with ESP metering.

In this mode, anyone can enjoy taking pictures with ease, even in difficult lighting conditions such as backlight.

How to Take Programmed Automatic Exposure Pictures with ESP Metering

Make sure the camera is set for the ESP meter

Set the mode selector dial to the "PROGRAM" position. 


Set the lens to its minimum aperture.

Press the shatter release lightly to activate the viewfinder display.4www.butkus.org

(A built-in battery conserves turns off the viewfinder display after 60 seconds.)

Focus on your subject.

The mark will appear in the finder when ESP metering is adjusting the exposure.


Press the shutter release to take the picture.


Rewinding the Film
When the exposure counter indicates the end of your roll of film

Push the ""R"" button.


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.4www.butkus.org


< Taking Photographs (II) >

This mode a; you to respond creatively to the photo situation l free selection the lens aperture, shutter speed and exposure compensation settings. 

How to Take Aperture-Preferred Automatic Exposure Pictures
Set the mode selector dial to the "AUTO" position.

Select the light metering mode.

ESP Metering

"OTF" Light Metering



Set the aperture.

Basic aperture setting

Press the shutter release lightly to activate the viewfinder display.

Focus on your subject


Press the shutter release to take the photograph.

If you see an overexposure warning signal (the number "1000" blinks), set the aperture to a larger number.4www.butkus.org

If the shutter speed is too slow, set the aperture to smaller number to prevent camera shake.

Manual Exposure

Set the mode selector dial to the "MANUAL" position



Set the aperture



Select the shutter speed.




Focus, then press the shutter release.

To Obtain the Proper Exposure:

Set the shutter speed ring to the setting indicated in the viewfinder.
ESP Metering 

"OTF" Light Metering


Manual Film Speed Setting

Release the DX ISO AUTO SET mode.

Lift up the outer collar and rotate until the desired ISO speed appears in the window.4www.butkus.org


Readjust the index line.

If the film speed dial (exposure compensation dial) cannot be turned to the ISO number of the film used set it once at an intermediate value then repeat steps 2 to 3 until the desired ISO number is set.


Exposure Compensation
 For exposure compensation, set the dial anywhere except at "DX ISO AUTO SET".

When an exposure compensation is set, the indicator lights in the  viewfinder.

· After shooting, return the dial to its original position.