EF50mm f/1.2L USM
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Instruction
a Safety Precautions
This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) This device may not
cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause
undesired operation.
Do not make any changes or modifications to the equipment
unless otherwise specified in the instructions. If such changes or
modifications should be made, you could be required to stop
operation of the equipment.
This equipment has been tested and found to comply with the
limits for class B digital device, pursuant to part 15 of the FCC
Rules. se limits are designed to provide reasonable protection
st hamful interference in a residential installation. This
ment generates, uses and can radiate radio frequency
enrgy and, if not installed and used in accordance with the
nstructions, may cause harmful interference to radio
communications.
However, there is no guarantee that interference will not occur in
a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of
the following measures:
a Safety 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 in
a warm one, condensation may develop on the
lens surface and internal parts. To preven
condensation in this case, first put the lens into an
airtight plastic bag before taking it from a cold to
warm environment. Then take out the lens after it
has warmed gradually. Do the same when taking
the lens from a warm environment into a cold one.
• Do not leave the lens in excessive heat such as in
a car in direct sunlight. High temperatures can
cause the lens to malfunction.
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Consult the dealer or an experienced radio/TV technician for
help.
This Class B digital apparatus complies with Canadian ICES-003.
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Nomenclature
Distance scale (→ 5, 6)
Infrared index (→ 6)
Hood mount (→ 7)
Depth-of-Field scale (→ 6)
Filter mounting
thread (→ 7)
Focus mode switch (→ 5)
Contacts (→ 4)
Focusing ring (→ 5)
Lens mount index (→ 4)
For detailed information, reference page numbers are provided in parentheses (→ **).
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1. Mounting and Detaching the Lens
See your camera’s instructions for details on
mounting and detaching the lens.
The lens mount has a rubber ring for enhanced
water- and dust-resistance. The rubber ring may
cause slight abrasions around the camera's lens
mount, but this will not cause any problems. If the
rubber ring becomes worn, it is replaceable by a
Canon Service Center at cost.
¡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 ens
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 with the dust
cap. To attach it properly, align the lens mount
index and the
K
index of the dust cap as shown
in the diagram, and turn clockwise. To remove it,
reverse the order.
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2. Setting the Focus Mode
3. Infinity Compensation Mark
Infinity compensation mark
Distance index
To shoot in autofocus (AF) mode, set the focus
mode switch to AF.
To use only manual focusing (MF), set the focus
mode switch to MF, and focus by turning the
focusing ring. The focusing ring always works,
regardless of the focus mode.
To compensate for shifting of the infinity focus
point tt results from changes in temperature.
infiny position at normal temperature is the
pint at which the vertical line of the L mark is
aligned with the distance indicator on the
distance scale.
After autofocusing in ONE SHOT AF mode, focus
manually by pressing the shutter button halfway and
turning the focusing ring. (Full-time manual focus)
For accurate manual focusing on subjects at
infinity distance, look through the viewfinder while
rotating the focusing ring.
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4. Infrared Index
5. Depth-of-Field Scale
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 focusing ring to the
corresponding infrared index mark.
The deth of field is the distance in front of and
behind he plane of focus on the subject that
ears harp. The depth of field is indicated by
tarea between the depth-of-field scale lines
below the distance scale. Numbers in the scale
are in F values, and for example, if the shooting
distance is 3m and the aperture is f/11, the
sharp area will extend from about 2m to 5m.
Some EOS cameras cannot use infrared film. Se
the instructions for your EOS camera.
The depth-of-field scale is an approximate
indicator.
¡The infrared index position is based on a
wavelength of 800 nm.
¡Be sure to observe the manufacturer’s
instructions when using infrared film.
¡Use a red filter also when you take the picture.
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6. Hood
7. Filters (Sold separately)
You can attach filters to the filter mounting thread
on the front of the lens.
¡To ensure dust- and water-resistant
performance, attach a Canon PROTECT filter
(72mm).
¡Only one filter may be attached.
¡If you need a polarizing filter, use the Canon
Circular Polarizing Filter (72mm).
¡To adjust the polarizing filter, first remove the
lehood.
The ES-78 hood can keep unwanted light out of
the lens, and also protects the lens from rain,
snow, and dust.
Attach and align the hood to the hood mount
the front of the lens, and turn the hood as sho
by the arrow to secure it.
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.
¡When attaching or detaching the hood, grasp
the base of the hood to turn it. To prevent
deformation, do not grasp the rim of the hood to
turn it.
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8. Extension Tubes (Sold separately)
9. Close-up Lenses (Sold separately)
You can attach Extension Tube EF12 II or EF25
Attaching a 500D (72mm) Close-up Lens
II for magnified shots. The shooting distance and enables close-up photography.
magnification are shown below.
Magnification will be 0.25× – 0.10×.
Camera-to-Subject
Distance (mm)
¡Close-up Lens 250D cannot be attached
because there is no size that fits the lens.
¡Manual focusing is recommended for accurate
focusing.
Magnification
Near
246
204
Far
322
218
Near
Far
EF12 II
EF25 II
0.39×
0.67×
0.24×
0.53×
Manual focusing is recommended for accurate
focusing.
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Specifications
Focal Length/Aperture
Lens Construction
Minimum Aperture
Angle of View
Min. Focusing Distance
Max. Magnification
Field of View
Filter Diameter
Max. Diameter and Length
Weight
50 mm f/1.2
6 groups, 8 elements
f/16
Diagonal: 46°
0.45 m / 1.5 ft.
0.15 ×
Vertical: 27°
Horizontal: 40°
164 × 250 mm / 6.5 × 9.8 inch (at 0.45 m)
72 mm / 2.8 inch
85.8 × 65.5 mm / 3.4 × 2.6 inh
590 g / 20.8 oz
Hood
ES-78
Lens Cap
E-72U/E-72 II
Case
LP1214
¡The lens length is measured from the mount urfce to the front end of the lens. Add 21.5 mm to include the
E-72U lens cap and dust cap, and 24.2 mm for the E-72 II.
¡The size and weight listed are for the lens only, except as indicated.
¡The EF1.4X II/EF2X II extenders cannot be used with this lens.
¡Aperture settings are specified on the camera.
¡All data listed is measured according to Canon standards.
¡Product specifications and appearance are subject to change without notice.
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CT1-8544-004
0812Ni
© CANON INC. 2006
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