Evaluative metering, Center-weighted average metering, Metering systems – Canon EOS-1 User Manual
Page 18: Four metering systems provide total control
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Four metering systems provide total control
The EOS-1 features four metering
modes that are easily selected by
using the main electronic input dial.
Evaluative metering
six-zone evaluative metering
provides exceptionally precise
metering under difficult photo
graphic conditions, making it easy to
handle backlit subjects. In this
mode, light is measured separately in
six zones. Ambient light, subject size
and subject pattern are input and
“evaluated” by a microprocessor
using a highly complex algorithm
that determines the correct exposure.
Center-weighted average metering
By increasing the value of the light
in the central area — the place where
the main elements are most likely to
be — more selective metering can be
accomplished under conventional
lighting conditions. This pattern will
be familiar to Canon F-1 users.
Custom Function No. 8 replaces
evaluative metering with center-
weighted average metering.
METERING SYSTEMS
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