Nomenclature
Lens
Lens with a distance scale
Hood mount (p.258)
Filter thread
(front of lens) (p.258)
Zoom ring (p.32) 
Focusing ring (p.92,145) 
Image Stabilizer switch (p.33)
Focus mode switch (p.31)
Zoom position index (p.32) Distance scale
Contacts (p.13) Lens mount index (p.31)
Lens without a distance scale
Hood mount (p.258)
Filter thread 
(front of lens) (p.258)
Focusing ring (p.92,145)
Focus mode switch (p.31)
Zoom position index (p.32)
Zoom ring (p.32)
Image Stabilizer switch (p.33)
Contacts (p.13)
Lens mount index (p.31)
21