Samsung NX20 User Manual page 39

Lenses
My Camera >
To unlock the lens, rotate the zoom ring counter-clockwise until you hear
the click.
You cannot capture a photo when the lens is locked.
SAMSUNG 16 mm F2.4 lens (example)
1
2
3
4
No. Description
1
i-Function button (p. 51)
2
Lens mount index
3
Focus ring (p. 72)
4
Lens
5
Lens contacts
5
38