Canon EF50mm f/1.0L USM User manual

Instruction
EF50mm F1.2L USM

ENG-1
Thank you for purchasing a Canon USM lens.
The Canon EF50mm f/1.2L USM lens is a
high-performance, large-aperture standard
lens with a large-diameter, high-precision,
aspherical lens element designed for EOS
cameras.
The lens is suitable for portraits and other
types of photographs making full use of the
large-diameter lens feature for nice
background blur.
¡“USM” stands for Ultrasonic Motor.
Features
1. Large-diameter, high-precision aspheric lens
element for excellent imaging performance
even at the maximum aperture.
2. USM for fast, quiet focusing.
3. Manual focusing is available after the subject
comes into focus in autofocus mode (ONE
SHOT AF).
4. A truly round aperture hole results in a nicer
background blur.
5. Tight seal structure ensures excellent dust-
proof and drip-proof performance.
•The lens is dust- and water-resistant. However,
since the front lens element rotates during
focusing, dust and water can still enter from the
front. Attaching a filter is therefore necessary.
Without the filter, the lens will not be completely
dust- and water-resistant.
Conventions used in this instruction
Warning to prevent lens or camera
malfunction or damage.
Supplementary notes on using the lens
and taking pictures.

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aSafety Precautions
aSafety Precautions
1. 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.
2. 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.
aHandling Cautions
If the lens is taken from a cold environment into a warm
one, condensation may develop on the lens surface and
internal parts. To prevent 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.
T his 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 a class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the
instructions, 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:
•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 digital apparatus does not exceed the Class B limits for radio
noise emissions from digital apparatus as set out in the
interference-causing equipment standard entitled “Digital
Apparatus”, ICES-003 of the Industry Canada.
N118

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Distance scale (→ 5, 6)
Depth-of-Field scale (→6)
Contacts (→4)
Focus mode switch (→5)
Hood mount (→7)
Lens mount index (→4)
Filter mounting
thread (→7)
Infrared index (→6)
Focusing ring (→5)
Nomenclature
For detailed information, reference page numbers are provided in parentheses (→ **).

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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 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.
1. 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.

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3. Infinity Distance 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.
For accurate manual focusing on subjects at
infinity distance, look through the viewfinder while
rotating the focusing ring.
2. Setting the Focus Mode
After autofocusing in ONE SHOT AF mode, focus
manually by pressing the shutter button halfway and
turning the focusing ring. (Full-time manual focus)
To shoot in autofocus mode, set the focus mode
switch to AF.
To use only manual focusing, set the focus mode
switch to MF, and focus by turning the focusing
ring. The focusing ring always works, regardless
of the focus mode.
Infinity compensation mark
Distance index

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5. 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. 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.
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 focusing ring to the
corresponding infrared index mark.
4. Infrared Index
Some EOS cameras cannot use infrared film. See
the instructions for your EOS camera.
¡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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7. Filters (Sold separately)
8.
Gelatin Filter Holder (Sold separately)
You can attach filters to the filter mounting
thread on the front of the lens.
¡Only one filter may be attached.
¡If you need a polarizing filter, use Canon’s PL-C
72mm polarizing filter. Autofocusing is still
possible while it is attached.
¡To adjust the polarizing filter, first remove the
lens hood.
¡When the PL-C 72mm polarizing filter is
attached, the lens cap cannot be attached.
With the Gelatin Filter Holder, you can use filters
to create various effects.
The Gelatin Filter Holder compatibility is shown
below.
¡Gelatin Filter Holder lll:
Compatible (Hood cannot be used)
¡Gelatin Filter Holder lV:
No more than one hood can be attached.
Focus manually when the Gelatin Filter Holder is
used.
6. Hood
The ES-78 hood reduces annoying flare and also
protects the front of the lens from rain, snow,
dust, etc. Turn the hood clockwise to securely
attach it to the lens. 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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9. Extension Tubes (Sold separately)
With Extension Tube EF12 II or EF25 II, the
camera-to-subject distance and image
magnification will be as follows:
Camera-to-Subject
Magnification
Distance (mm)
Near Far Near Far
EF12 II 246 322 0.39×0.24×
EF25 II 204 218 0.67×0.53×
10. Close-up Lenses (Sold separately)
Attaching a 500 or 500D (72mm) Close-up Lens
enables close-up photography.
Magnification will be 0.25×– 0.10×.
¡Sales of the 500 Close-up Lens may already be
terminated in some areas.
¡Close-up Lens 250D cannot be attached
because there is no size that fits the lens.
¡When using a Close-up Lens, focus manually.
When an Extension Tube is attached, focus
manually.

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Specifications
Image Size 24 ×36 mm
Focal Length/Aperture 50 mm f/1.2
Lens Construction 6 groups, 8 elements
Minimum Aperture f/16
Angle of View Diagonal: 46° Vertical: 27° Horizontal: 40°
Min. Focusing Distance 0.45 m / 1.5 ft.
Max. Magnification 0.15 ×
Field of View 164 ×250 mm / 6.5 ×9.8 inch
Filter Diameter 72 mm / 2.8 inch
Max. Diameter and Length 85.8 ×65.5 mm / 3.4 ×2.6 inch
Weight 590 g / 20.8 oz
Hood ES-78
Lens Cap E-72U
Case LP1214
¡The lens length is measured from the mount surface to the front end of the lens. Add 21.5 mm when including
the lens cap and dust cap.
¡The size and weight listed are for the lens only, except as indicated.
¡Aperture settings are specified on the camera.
¡The EF1.4X II/EF2X II extenders cannot be used with this lens.
¡All data listed is measured according to Canon standards.
¡Product specifications and appearance are subject to change without notice.

©CANON INC. 2006CT1-7567-000 2006.11.1