LG LCV5500-BN Owner's Manual page 16

Installation
5. Adjust the focus.
5-1. Unlock the focus lever.
5-2. Move the lever to adjust the focus.
5-3. Lock the lever.
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NEAR
6. This camera utilizes an on-screen user MENU. To set
items on the menu, use the following buttons. After
then attach the lens cover and dome cover.