Olympus OM-PC Operations Instructions Page 35
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ESP (Electro-Selective Pattern) Metering
Generally, a photograph includes objects with
different levels of brightness. Center-weighted,
averaged light metering is an excellent method for
the majority of ordinary subjects. It averages the
light intensity in a picture frame to determine
exposure. With backlighting and other types of
illumination, however, this metering method may
not provide correct exposure because the light
level often differs between the subjects and back-
grounds. The Olympus OM-4, OM-3 and OM-2S
PROGRAM have adopted spot metering systems
which allow the photographer to isolate the subject
for specific metering and therefore to obtain more
accurate exposures.
The new ESP metering system has been specifically
developed for the OM-PC to simplify exposure in
these difficult lighting conditions. As soon as you
fire the shutter, the camera will measure the light
intensity in both the center of the frame and outer
area separately. The micro computer then processes
this information, including contrast data, and auto-
matically sets optimum exposure according to the
ESP algorithm*. By simply depressing the shutter
release, you can produce a photograph in which the
subject will appear as you see it with your eyes.
* For further information on ESP algorithm, refer
to page 39.
TTL Direct Off-The-Film "OTF" Light Metering
(Center-Weighted Average Metering)
This is the direct, center-weighted, averaged light
metering system which Olympus pioneered in the
original model OM-2. It measures the brightness of
the subject as the light registers on the film during
the actual exposure. "OTF" metering can respond
to any sudden changes in light during exposure, and
therefore it is very advantageous for taking quick
candid shots and fast moving subjects. In flash
photography with an Olympus T-Series flash, this
"OTF" Light Metering method will also fully
control the flash exposure, thereby eliminating any
need for complicated guide number exposure
calculations. You can work with all available aper-
tures of your lens and use sophisticated techniques
such as bounce flash and multi flash in a fully
automatic mode. It has also solved difficult ex-
posure problems with macrophotography.
34
- TABLE OF CONTENTS 3
- Mounting the Lens 6
- Removing the Lens: 7
- Loading the Batteries 8
- Checking the Batteries 9
- "DX" 10
- Set the film speed dial to 10
- Loading the Film 11
- ESP Metering 15
- Rewinding the Film 18
- Weighted Average Metering) 21
- Set the aperture 22
- Basic aperture settings 22
- Focus on your subject 22
- Manual Exposure 24
- Select the shutter speed 25
- Metering 25
- Manual Film Speed Setting 26
- Readjust the Index line 27
- Exposure Compensation 28
- < Other Operations > 29
- Using the Self-Timer 30
- Bulb Exposure 32
- Advanced Techniques 33
- This symbol 34
- Backlighting 36
- Notes on ESP metering 39
- Averaged metering 40
- Viewfinder 41
- Program Exposures 42
- PROGRAM DIAGRAMS 43
- Setting 44
- Blinks to show overexposure 44
- Auto Exposures 45
- DEPTH OF FIELD 46
- PREVIEW BUTTON 47
- SHUTTER SPEEDS 48
- Shutter speed indications 50
- Appropriate figure lights up 50
- Selector Dial 52
- ISO Manual Setting 53
- BULB EXPOSURE 54
- MULTIPLE EXPOSURE 55
- INFRARED PHOTOGRAPHY 55
- Flash Photography 57
- T-Series Flashes 58
- Mounting the Flash 58
- How to Use T-Series Flashes 59
- Close-up Flash 60
- Flash-to-subject distance 61
- Shooting with Motor Drive 62
- Motor Drive Group Units 63
- Macrophotography 64
- Macrophoto Group Units 65
- OTHER SYSTEM UNITS 66
- Handling Care 68
- Storage Care 69
- Battery Precaution 69
- QUESTIONS AND ANSWERS 70
- Description of Controls 74
- ISO/ASA Film Speed 75
- Film Advance Lever 75
- Film Chamber 76
- Battery Chamber 76
- Film Window 76
- SPECIFICATIONS 77
- OLYMPUS OPTICAL CO.,LTD 78
- OLYMPUS CORPORATION 78
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