Canon Camera Lens EF17 40MM F 4L USM User Manual

EF17-40mm f/4L 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 a class B digital device, pursuant to part 15 of the FCC  
Rules. These limits are designed to provide reasonable protection  
againharmful interference in a residential installation. This  
ipmnt generates, uses and can radiate radio frequency  
eergy 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:  
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 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.  
• 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  
Focus mode switch (5)  
Distance scale (6)  
Hood mount (7)  
Zoom ring (5)  
Gelatin filter holder (8)  
Filter mounting  
thread (7)  
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 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.  
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2. Setting the Focus  
Mode  
3. Zooming  
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 zoom, turn the lens’ zoom ring.  
Be sure to finish zooming before focusing.  
Changing the zoom ring after focusing can affect  
the focus.  
After autofocusing in ONE SHOT AF mode, focus  
manually by pressing the shutter button halfway  
and turning the focusing ring. (Full-time manual  
focus)  
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4. Infinity Compensation Mark  
5. Infrared Index  
Infinity compensation mark  
Distance index  
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.  
The infrared index corrects the focus setting when using  
monochrome infrared film. Focus on the subject  
nually, then adjust the distance setting by moving the  
focusing ring to the corresponding infrared index mark.  
Some EOS cameras cannot use infrared film. See  
the instructions for your EOS camera.  
For accurate manual focusing on subjects at  
infinity distance, look through the viewfinder while  
rotating the focusing ring.  
• The infrared index position is based on a  
wavelength of 800 nm.  
• The compensation amount differs depending on  
the focal length. Use the indicated focal length  
as a guide when setting the compensation  
amount.  
• Be sure to observe the manufacturer’s  
instructions when using infrared film.  
• Use a red filter 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  
(77mm).  
2 4  
• Only one filter may be attached.  
• If you need a polarizing filter, use the Canon  
Circular Polarizing Filter (77mm).  
The EW-83E 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 as shown by the arrow  
until the lens' 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.  
• 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. Filter Holder  
9. Extension Tubes  
(Sold separately)  
You can attach Extension Tube EF12 II or EF25  
II for magnified shots. The shooting distance and  
magnification are shown below.  
Camera-to-Subject  
Magnification  
Distance (mm)  
Near  
155  
Far  
159  
271  
Near  
0.83×  
0.59×  
Far  
17mm  
40mm  
17mm  
40mm  
0.70×  
0.32×  
EF12 I  
F25 II  
206  
There is a gelatin filter holder at the rear of the  
lens. Cut the gelatin filter to fit within the white  
frames. Then insert the gelatin filter into the filte
holder.  
Incompatible  
196  
218 1.02×  
0.70×  
Manual focusing is recommended for accurate  
focusing.  
• Only one filter can be used.  
• When you use a gelatin filter, ghosting may  
appear in the image.  
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10.Close-up Lenses  
(Sold separately)  
Attaching a 500D (77mm) Close-up Lens  
enables close-up photography.  
The magnification will be as follows:  
• Can be used at the 40mm end (magnification  
0.30x - 0.08x)  
• Close-up Lens 250D cannot be attached  
because there is no size that fits the lens.  
• Manual focusing is recommended for accurate  
focusing.  
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11.Specifications  
Focal Length/Aperture  
Lens Construction  
Minimum Aperture  
Angle of View  
17 – 40 mm f/4  
9 groups, 12 elements  
f/22  
Diagonal: 104° – 57° 30’  
0.28 m/0.92 ft.  
Vertical: 70° 30’ – 34°  
Horizontal: 93° – 49° 20’  
Min. Focusing Distance  
Max. Magnification  
Field of View  
0.24× (at 40 mm)  
234 × 365 mm – 100 × 150 mm / 9.2 × 14.4 inch – 3.9 × 5.9 inch (at 0.28 m)  
Filter Diameter  
77 mm  
Max. Diameter and Length 83.5 × 96.8 mm / 3.3 × 3.8 ih  
Weight  
Hood  
475 g / 16.8 oz  
EW-83E  
Lens Cap  
Case  
E-77U  
LP1319  
• 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.  
• 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.  
ENG-10  
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© CANON INC. 2003  
CT1-7546-006  
2009.7  

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