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ZOOMING
*Rotate the zoom ring while viewing through the camera's viewfinder and compose
your image with the correct focal length obtained.
ZOOM LOCK SWITCH
This lens is equipped with a newly developed zoom lock switch mechanism, which
prevents the lens barrel from extending toward long focal lengths by their own
weight, while hanging off the shoulder, or a chair for example. Activate the switch at
28mm setting to stop the lens barrel from rotating and extending.
How to activate the zoom lock switch mechanism:
1. Locking: Set the lens to the 28-mm position. Move the switch toward the camera,
until the index lines align with each other. The lens barrel is now locked in position
and does not rotate or extend by its own weight.
2. Releasing: Push the switch away from the camera. The lens barrel is now free to
rotate and extend for zooming.
*The zoom lock switch can not be activated unless the lens is set to the 28-mm posi-
tion. Do not force the lock switch or do not try to rotate the lens barrel while locked.
*The lens can be used at 28-mm setting for picture taking while lens barrel is locked
by the switch.
*The zoom lock mechanism is made to prevent the lens barrel from extending while
carried around. When not locked, the zoom lens may change its focal length during a
long exposure if used while in a low or high angle position.
LENS APERTURE AND AE MODE
*Setting the lens f-numbers with Canon and Minolta cameras
Set the f-number with the aperture-setting device of the camera body in accordance
with the selected photographing mode.
**For further details, please read the instruction manual of your camera.
*Setting lens f-numbers with Nikon and Pentax cameras
Photographing in a programmed-AE or a shutter-priority AE mode, rotate the lens
aperture ring to the minimum aperture setting position, in case of a Nikon camera,
and set on the "A" position in case of Pentax camera.The aperture ring will be locked
in position automatically. When shooting in aperture priority-AE or manual exposure
mode, release the lens aperture ring by rotating the ring from the AE lock position by
depressing the Aperture ring lock button.
**The lens aperture varies with zooming movement. Cameras read the different lens
openings and automatically adjust the exposure properly.
**For further details, please read the instruction manual of your camera.