Nikon 50mm f/1.4G User Manual page 11

Nomenclature
1 Lens hood (p.14)
2 Lens hood attachment index (p.14)
En
3 Lens hood setting index (p.14)
4 Lens hood mounting index (p.14)
5 Focus ring (p.13)
6 Distance scale (p.13)
7 Distance index line (p.13)
8 Mounting index
9 Lens mount rubber gasket (p.15)
0 CPU contacts (p.15)
! Focus mode switch (p.13)
( ): reference page
11