EF 17-40 mm /F 4 0 L USM - Lens CANON - Free user manual and instructions

USER MANUAL EF 17-40 mm /F 4 0 L USM CANON

Thank you for purchasing a Canon product.

The Canon EF17-40mm f/4L USM is a high-performance wide-angle zoom lens.

- "USM" stands for Ultrasonic Motor.

Conventions used in this instruction

Warning to prevent lens or camera malfunction or damage.

Supplementary notes on using the lens and taking pictures.

Features

1. Two aspherical elements and a Super UD element result in outstanding image delineation.
2. Ultrasonic motor (USM) for quick and quiet autofocusing.
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.

- Since the front element of this lens moves when focusing (zooming), you need to attach a Canon PROTECT filter sold separately for adequate dust- and water-resistant performance. Without a filter, the lens is not dust or water-resistant.

Safety Precautions

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.

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 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 Class B digital apparatus complies with Canadian ICES-003.

Nomenclature

Hood mount (→ 7) Focus mode switch (→ 5) Distance scale (→ 6) Zoom ring (→ 5) Gelatin filter holder (→ 8) Filter mounting thread (→ 7) Focusing ring (→ 5) Contacts (→ 4) 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.

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Technical line drawing of a mechanical component with concentric rings and mounting holes (no text or symbols)

Cross-sectional diagram of a mechanical component with internal channels and a central hub (no text or symbols)

• 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 index of the dust cap as shown in the diagram, and turn clockwise. To remove it, reverse the order.

!

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.

2. Setting the Focus Mode

Technical line drawing of a DSLR camera with attached control panel (no text or symbols)

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.

After autofocusing in ONE SHOT AF mode, focus manually by pressing the shutter button halfway and turning the focusing ring. (Full-time manual focus)

3. Zooming

Line drawing of a DSLR camera lens with no visible text or symbols

To zoom, turn the lens' zoom ring.

Be sure to finish zooming before focusing. Changing the zoom ring after focusing can affect the focus.

4. Infinity Compensation Mark

Infinity compensation mark 1.5 3 ft 0.5 1 m 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.

For accurate manual focusing on subjects at infinity distance, look through the viewfinder while rotating the focusing ring.

5. Infrared Index

1.5 3 0.5 1 ∞ ft m 17

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.

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.
• 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

Technical diagram showing camera lens assembly with numbered parts and a close-up of the component detail

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.

• P art 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.

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).
• Only one filter may be attached.
• If you need a polarizing filter, use the Canon Circular Polarizing Filter (77mm).

8. Filter Holder

Technical line drawing of a camera lens assembly (no text or symbols)

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 filter holder.

• Only one filter can be used.
• When you use a gelatin filter, ghosting may appear in the image.

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 Distance (mm)		Magnification
		Near Far	Near Far
EF12 II	17mm	155 159 0	83×0.70×
	40mm	206 271 0	59×0.32×
EF25 II	17mm	Incompatible
	40mm	196 218 1	02×0.70×

Manual focusing is recommended for accurate focusing.

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.

11. Specifications

Focal Length/Aperture 17 –	40 mm f/4
Lens Construction 9 groups, 12 elements
Minimum Aperture f/22
Angle of View	Diagonal: 104^ - 57^ 30' Vertical: 70^ 30' - 34^ Horizontal: 93^ - 49^ 20'
Min. Focusing Distance 0.28 m/0.92 ft.
Max. Magnification	0.24× (at 40 mm)
Field of View	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 inch
Weight 475 g / 16.8 oz
Hood EW-83E
Lens Cap	E-77U
Case	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.

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Canon

© CANON INC. 2003CT1-8513-003