Olympus OM-2 - Manual (Page 49)

Exposure range of OM-2 in automatic mode
Shutter Speed at F1.2
Exposure range of conventional
AE SLRs
Advantageous Points of Through-The-Lens Direct
(off-the-film) Light Measuring Method
1. The OM-2 sensors respond instantly to changes
in the light during exposure and feed back the
information to the shutter control mechanism.
2. The sensors measure flash intensity as it builds
up and cut off its light at the source when the
correct exposure level is reached. (TTL Cen-
tralized Control Flash)
3. Even during 5-frame-per-second motor drive
operation, this Method insures correct ex-
posure for each frame individually.
4. The Method operates accurately in far dimmer
light than other systems. ASA 100 film can
be automatically exposed for up to 120 sec-
onds at F1.2.
5. The Method excludes all possibilities of stray
light leaking through the camera eyepiece and
affecting the exposure reading.
6. The Method gives correct exposures even when
the clear-field type focusing screen is in use.
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