Canon EF 70-200mm f/2.8L IS USM Instruction page 13

11. Hood
The ET-86 hood can keep unwanted light out of the lens,
and also protects the front of the lens from rain, snow,
and dust.
To attach the hood, align the hood's attachment position
mark with the red dot on the front of the lens, then turn
the hood clockwise until the lens's red dot is aligned with
the hood's stop position mark.
The hood can be reverse-mounted on the lens for storage.
• Part of the picture may be blocked if the hood is
not attached properly.
• To attach (remove) the hood, grasp the base of
the hood and turn it clockwise
(counterclockwise). Do not hold the hood by the
outer rim as this could result in the hood being
distorted if too much pressure is applied.
ENG-12
12. Filters
You can attach filters to the filter mounting thread
on the front of the lens.
• If you need a polarizing filter, use Canon's
PL-C 77 mm ll polarizing filter. Note that you must
remove the hood before adjusting the polarizing filter.
• When the PL-C 77mm ll polarizing filter is attached,
the lens cap cannot be attached.
13. Extension Tubes
With Extension Tube EF 12 ll or EF 25 ll, the
camera-to-subject distance and image
magnification will be as follows:
Camera-to-Subject
Distance (mm)
Near
70mm 550
EF12 ll
200mm 1110
70mm 402
EF25 ll
200mm 929
(Optional)
(Optional)
Magnification
Far Near
624 0.22×
3401 0.24×
407 0.41×
1737 0.32×
Far
0.17×
0.06×
0.38×
0.14×