Canon 100-300mm F2.8 L IS USM Instructions Manual page 18

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10. Hood
The custom lens hood cuts out unwanted light that can cause flare and ghosting and protects the
front of the lens from rain, snow, and dust.
OAttaching the Hood
Loosen the hood lock knob by turning it
counterclockwise. Fit the hood onto the lens's
hood mount, and tighten the lock knob to fix it in
place securely.
If the hood is not attached properly, vignetting (darkening of the perimeter of the picture) may occur.
O
O
Lock knob
ODetaching the Hood
Loosen the hood lock knob by turning it
counterclockwise and detach the hood.
The hood can be reverse-mounted on the lens
for storage.
ENG-17

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