Canon EOS 6D Instruction Manual page 21

Lens
EF 24-105mm f/4L IS USM
Focus mode switch (p.35)
Hood mount (p.37)
φ77mm filter thread
(front of lens)
Focusing ring (p.80, 111)
Image Stabilizer switch (p.38)
Nomenclature
Distance scale
Infrared index
Zoom ring (p.36)
Zoom position
index (p.36)
Contacts (p.13)
Lens mount index (p.35)
21