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ZOOM LOCK SWITCH (Ref. Figs. 3 & 4)
Model A18 is equipped with zoom lock switch mechanism which prevent lens barrel
from extending towards long focal length, while hanging around the neck. Activate the
switch at the shortest setting to stop the lens barrels from rotating and extending.
How to activate the zoom lock switch mechanism
1. Locking: Set the zoom ring on the lens to the shortest position. Move the zoom
lock switch (12) toward the camera for locking the zooming ring (9). The lens barrel is
locked in position when the portion beneath "Lock" is shown in red and the lens barrel
does not rotate or extend by its own weight.
2. Releasing: Push the zoom lock switch (12) up. The zooming ring (9) is now
released and can be rotated.
Zoom lock switch cannot be activated unless the lens is set to the shortest position. Do not
force the lock switch or try to rotate the zooming ring while locked; doing so may damage the lens.
The zoom lock mechanism is made to prevent the lens barrel from extending while carried
around the neck. When not locked, the zoom lens may change its focal length during a long expo-
sure used in a low or high angle position.
The lens can be used at the shortest setting for picture taking even while in the focused
position.
LENS APERTURE AND AE MODE
Please follow the instruction manual of your camera.
LENS HOOD (Ref. Figs. 1, 7, 8, 9)
A bayonet-type lens hood is provided as standard equipment. We recommend shoot-
ing with the hood attached whenever possible as the lens hood eliminates stray light
which is harmful to the picture. However, please be aware of the precautions written
below when your camera is equipped with a built-in flash.
Attaching the Lens Hood (Ref. Figs. 7 & 8)
Align the index mark (2) on the hood with the corresponding index mark (5) or the
top of the index line of the distance scale, on the lens. Press the hood lightly onto the
hood attaching bayonet ring (Fig. 7, No. 1) and then rotate it clockwise to secure (Fig.
7, No. 2). The lens hood will be securely held as the mark "TAMRON O" comes to the
top (Fig. 8, No. 3). When attaching the lens hood, hold the focusing and zoom control
rings so that they are not rotated unintentionally.
Pay particular attention to align the hood attaching indexes when using zoom lenses including
wide-angle (ex. 35mm or wider) settings. Improper attachment of a hood for wide-angle zoom lens
may cause large shadowed areas in your pictures.