Olympus IS-1 - Manual (Page 47)

Exposure compensation
The exposure compensation levels can be set up to ±4EV with 1/3EV steps,
(refer to p. 60)
NOTE: During manual exposure, exposure compensa-
tion cannot be performed.
— While pressing the + /– button, the frame number
display changes to compensation level display.
An exposure compensation indicator will light up
in the viewfinder and on the LCD panel.
*While pressing + / – button, press the shift
button to set the desired compensation level.
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