Olympus IS-1 - Manual (Page 50)

* Press the shutter release button halfway to
focus
* Press either T (Telephoto) or W (Wide angle)
on the zoom button while pressing the shutter
release button halfway.
T: Zooming in telephoto direction
W: Zooming in wide-angle direction
— The lens will not move until the shutter is fully
pressed.
*While pressing the Zoom button, press the
shutter release button fully to take the picture.
— Zooming will occur automatically once the shutter
release button is fully pressed (when the shutter is
open).
NOTE: For zoom exposure photography, confirm
that the shutter speed is slower than 1/3
second in the viewfinder.
If the shutter speed is faster than 1/3 second,
zoom exposure will automatically cancel and
the camera will operate in standard Night
scene mode.
The camera should therefore be securely
positioned (with a tripod for example).
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