Olympus IS-1 manual Measuring the amount of light, Light metering, Spot metering

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Measuring the amount of light

Light metering

Light metering refers to measuring the brightness of certain parts of a picture. The IS -1 employs three meterings: (1) ESP light metering, (2) center- weighted average light metering, and (3) spot

metering. According to your photographic

purpose, the IS-1 allows you to select that which is the most suitable.

At the same time, the IS-1 uses TTL (through the lens) light metering to automatically measure the light that enters the lens. This allows you to obtain very accurate light metering without any influence due to distance changes between the subject and the camera.

ESP (Electro Selective Pattern) light metering (Exposure mode P)

ESP light metering measures the central portion and peripheral portion of the frame separately. In doing so, the camera determines the proper exposure. The calculation processing program itself is based on trial and error data to properly compensate for backlighting. ESP light metering takes place automatically while in P (Program) mode.

Center-weighted average light metering Center-weighted average light metering is the most widely used light metering system (Fig. A). This system measures light within a wide range

with special emphasis on conditions in the center of the picture. When in A (Aperture-preferred) or M (Manual) mode, this light metering system

is automatically activated. Providing that differing contrast between brightness and darkness in the rest of the frame is not too

extreme (a portrait with an extremely bright background for example) the system provides excellent results.

Spot metering

Spot metering (Fig. B) measures the brightness in the central section of the frame only. Because this metering system calculates the correct exposure of one point, it is convenient when the subject is backlit or there is strong contrast in the picture. When shooting a subject in front of an extremely bright background, you should spot meter the subjects face. To make white objects look very white, use spot metering and then operate exposure compensation button in the (+) direction.

To make black objects look very black, use spot metering and then operate the exposure compensation button in the (-) direction.

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Contents Instructions Viewfinder Indicators Description of controls Power Focus photography Zoom exposureManual flash operation Auto flash photography Symbols used in this manual Loading the batteries Page Loading the film Open the back cover by sliding the back cover releaseAlign the film leader with the film loading indicator Close the back cover Unloading the film Is displayed on the LCD panel while Reset operation Press the Mode button and + / button simultaneouslyHow to take pictures Press part a to remove the lens cap Set power switch onOr Wide angle Press the shutter release button halfway to focus Frame in the center of the viewfinderPage Macro mode the shooting range 0 ft0 ft 0.6 m 2.0 ft Holding the camera Auto flash photography Press the shutter release button fully to take the picture Auto flash range Color negative filmFocus lock Selftimer On the LCD panel will blink Spot metering Position the subject for spot metering withinSpot frame in the center of the viewfinder Modes Macro photography Button to select Telephoto macro 100 mmPage Continuous mode Double exposure mode Page Portrait zoom mode Press the shutter release button fully Size of Head-and-shoulder subject Half-length Full-length9.5 m Night scene mode Use this mode for night time shootingSlow-synchro fill-in flash Zoom memory mode Will blink on the LCD panel for 2.5 seconds, then disappear Auto-S flash photography Button until AUTO-S is displayed onCompose your shot and press the shutter release button fully Scene mode or Portrait zoom mode Fill-in flashPage Exposure mode switching Aperture-preferred auto mode Manual exposure mode While pressing the exposure Mode buttonPress the shift button to set M Manual Exposure mode + Slight overexposure Exposure compensation Power Focus photography Press the button again to cancel PF Power Focus modeZoom exposure Press the Zoom button to set the focal lengthPage Manual flash operation Aperture setting color negative film How to take better pictures Effects of zoom and its advantages 70 mmAngle of view and depth of field Autofocus AF Subjects that are difficult to focus Automatic exposure mode Program chart Standard photography modeExposure Program chart portrait mode Night scene modeFill-in flash Measuring the amount of light Light meteringSpot metering Exposure compensation and film speed Fixed proper exposureExposure compensation Film speedFlash Flash strengthHigh Function Flash G40 Optional Normal slow-synchro Wide macro TeIe macro= 40 cm optional How to attach the strap Adjust the length of the strap as desired Accessories optional IS/L Lens A-28Soft case a Troubleshooting Battery powerCamera does not work Displays disappeared while shootingFlash does not emit Camera does not work in extremely cold weatherMy photos look like the film is cracked Care and Storage Specifications Viewfinder information Autofocus frame, spotExposure compensation + / 4 EV compensa Exposure counter Progressive type, displayed on LCD panelSelftimer Electronic selftimer with 12 sec. delay ManualDescription of controls LCD panel Olympus Corporation