Samsung BN59-01012A Fiche De Données

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My Camera > 
Lenses
54
SAMSUNG 20-50mm F3.5-5.6 ED II lens (example)
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No.
Description
1
Lens mount index
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Zoom lock switch
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Lens
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Focus ring (p. 96)
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i-Function button (p. 43)
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Zoom ring
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Lens contacts*
*  Avoid contact with or prevent damage to the lens contacts.
Locking or unlocking the lens
To lock the lens, slide the zoom lock switch away from the camera body, 
hold it in place, and then rotate the zoom ring as shown in the illustration.