Canon PowerShot A 640 User Manual page 160

Align the. mark on the conversion lens
adapter with the 0 mark on the camera, and
turn the adapter in the direction of the
arrows as far as the ring release button on
the camera•
• To remove the conversion lens adapter, turn the adapter in
the opposite direction with holding down the ring release
button.
Set the lens on the
adapter, and turn it in
the indicated direction
to attach it securely.
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