Olympus IS-2DLX, Инструкция по эксплуатации

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METERING THE AMOUNT OF LIGHT
Light Metering
Light metering can measure the brightness of the
framed picture in various ways. The IS-2 employs
three metering systems: (1) ESP light metering , (2)
center-weighted average light metering, and (3)
spot metering. The IS-2 allows you to select the
light metering system most suitable in any
photographic situation.
At the same time, the IS-2 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 that is not affected by
changes in the distance between the subject and
the camera.
Fuzzy Logic ESP (Electro-Selective Pattern) Light
Metering (Exposure Mode P)
ESP light metering measures the brightness of the
central portion and peripheral portion of the frame
separately in order to determine the proper
exposure. The calculation program used is based
on programmed data to properly compensate for
backlighting. ESP light metering is used
automatically when in the P (Program) mode.
Center-Weighted Average Light Metering
(Exposure Mode A or M)
Center-weighted average light metering is the most
widely used light metering system (Fig. A). This
system measures the light available throughout the
frame with special emphasis on the center of the
frame. When in A (Aperture-preferred) or M
(Manual) mode, this light metering system is
automatically activated.
When the contrast
between bright and dark
areas is not too extreme
outside the center of the
frame, this system offers
excellent results.
Spot Metering
Spot metering (Fig. B) measures the brightness at
the center of the frame only. Because this metering
system calculates the correct exposure for only one
point, it is convenient when the subject is backlit or
the picture contains strong contrasts. When
shooting a subject in front of an extremely bright
background, you should use spot-metering on the
subject's face. To properly expose white objects,
use spot metering and then press the + side of the
exposure compensation button. To properly expose
black objects, use spot metering and then press the
- side of the exposure compensation button.
Spot metering can be
used in any of the P, A or
M exposure modes.
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