Canon EF 200-400mm f4L IS USM Extender 1.4x - Manual (Page 21)

ENG-20
14. Case
Put the lens away as follows.
Reverse the lens hood, slip it over the lens,
and attach the lens cap.
Position the tripod mount towards you as
shown and place it in the case.
Place so that the hood’s lock knob faces
toward the front (handle) side of the case as
shown in the illustration.
Fold the strap and fit it into the space near
the case levers.
Fasten the lens securely with the strap.
Close the lid, and then push the lever while
holding the lid from above to lock.
● ● Do not sit on top of the lens case.
● ● Place the lens in the position intended for it.
Keyhole
Lock knob
Lid
Hinge
Lever
Strap
COP
Y