Canon lens EF 400mm f56L USM User Manual

EF135mm f/2L USM
EF200mm f/2.8L II USM
EF300mm f/4L USM
EF400mm f/5.6L USM
Instructions
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Thank you for purchasing a Canon product.
The Canon EF135mm f/2L USM, the EF200mm
f/2.8L II USM, the EF300mm f/4L USM, and the
EF400mm f/5.6L USM are high-performance
telephoto lenses designed for EOS cameras.
¡“USM” stands for Ultrasonic Motor.Features
1. UD lens elements (in the EF135mm f/2LUSM, the EF200mm f/2.8L II USM, the
EF300mm f/4L USM, and the EF400mm
f/5.6L USM) and super UD lens elements (in
the EF400mm f/5.6L USM) for excellent
imaging performance.
2. Ultrasonic motor (USM) for quick...

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aSafety Precautions
aSafety Precautions•Do not look at the sun or a bright light source
through the lens or camera. Doing so could result
in loss of vision. Looking at the sun directly through
the lens is especially hazardous.
• Whether it is attached to the camera or not, do
not leave the lens under the sun without the
lens cap attached. This is to prevent the lens from
concentrating the sun’s rays, which could cause a
fire.
Handling Cautions• If the lens is taken from a cold environment into
a...

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Distance scale  (→ 5, 6)Depth-of-Field scale  (→ 6)
Contacts (→ 4)
Focus mode switch (→ 4)
Hood mount*
1 (→ 8)
Lens mount index  (→ 4)
Filter mounting 
thread (→ 9)
Infrared index*3  (→ 6)
Focusing ring (→ 4) Distance index  (→ 5)
Focusing distance range selection switch (→ 5) Tripod mounting location*
2 (→ 7)
Nomenclature
*1) EF135mm f/2L USM • EF200mm f/2.8L II USM
*2,3) EF200mm f/2.8L II USM • EF300mm f/4L USM • EF400mm f/5.6L U\
SM
For detailed information, reference page numbers are provided...

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See your camera’s instructions for details on
mounting and detaching the lens.
¡After detaching the lens, place the lens with the
rear end up to prevent the lens surface and
electrical contacts from getting scratched.
¡ If the contacts get soiled, scratched, or have
fingerprints on them, corrosion or faulty
connections can result. The camera and lens
may not operate properly.
¡ If the contacts get soiled or have fingerprints on
them, clean them with a soft cloth.
¡ If you remove the lens, cover it...

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4.Infinity Compensation Mark
To  compensate for shifting of the infinity focus
point that results from changes in temperature.
The infinity position at normal temperature is the
point at which the vertical line of the L mark is
aligned with the distance indicator on the
distance scale.
F or accurate manual focusing on subjects at
infinity distance, look through the viewfinder while
rotating the focusing ring.
Infinity compensation mark
Distance index
3.Switching the Focusing Distance Range
You can...

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6. Depth-of-Field Scale
The depth of field is the distance in front of and
behind the plane of focus on the subject that
appears sharp. The depth of field is indicated by
the area between the depth-of-field scale lines
below the distance scale.
The number on the scale is the F value.
The depth-of-field scale is an approximate
indicator.
The infrared index corrects the focus setting
when using monochrome infrared film. Focus on
the subject manually, then adjust the distance
setting by moving the...

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Adjusting the Revolving MountYou can loosen the orientation lock-knob on the tripod mount to allow it to rotate as needed to fit a
particular camera model for switching between vertical and horizontal positions.
The EF200mm f/2.8L II USM lens can be used with the A II (B) tripod mount ring, sold separately.
DetachingUse the following procedures to remove and attach the tripod mount.
Tu rn  the locking knob
counterclockwise until it
becomes loose (about 3 turns),
and pull the knob in the direction...

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8. Hood
EF135mm f/2L USM • EF200mm f/2.8L II USM
Attach and align the hood to the hood mount on
the front of the lens, and turn the hood as shown
by the arrow to secure it.
The hood can be reverse-mounted on the lens
for  storage. EF300mm f/4L USM
Bring the hood out from the end of the lens until
it stops. For storage, reverse the procedure.
EF400mm f/5.6L USM
Bring the hood out from the end of the lens until
it stops and turn in the direction of the arrow. For
storage, reverse the procedure....

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9. Filters (Sold separately)
You can attach filters to the filter mounting thread
on the front of the lens.
¡If you need a polarizing filter, use the Canon
Circular Polarizing Filter.
¡To   adjust the polarizing filter, first remove or
store the lens hood.
10. Close-up Lenses 
(Sold separately)
Attaching a 500D Close-up Lens enables close-
up photography.
The magnification will be as follows:
¡EF135mm f/2L USM (72mm)0.48×  – 0.27 ×
¡EF200mm f/2.8L II USM (72mm) 0.57×  – 0.39 ×
¡EF300mm f/4L USM...