Canon EF 17-40mm f/4L USM EF17-40mm F4L USM Instruction Manual
Canon EF 17-40mm f/4L USM Manual
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Canon EF 17-40mm f/4L USM manual content summary:
- Canon EF 17-40mm f/4L USM | EF17-40mm F4L USM Instruction Manual - Page 1
EF17-40mm f/4L USM ENG Instruction - Canon EF 17-40mm f/4L USM | EF17-40mm F4L USM Instruction Manual - Page 2
you for purchasing a Canon product. The Canon EF17-40mm f/4L USM is a highperformance 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 - Canon EF 17-40mm f/4L USM | EF17-40mm F4L USM Instruction Manual - Page 3
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 generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may - Canon EF 17-40mm f/4L USM | EF17-40mm F4L USM Instruction Manual - Page 4
Nomenclature Hood mount (→ 7) Focus mode switch (→ 5) Distance scale (→ 6) 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 (→ **). - Canon EF 17-40mm f/4L USM | EF17-40mm F4L USM Instruction Manual - Page 5
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 - Canon EF 17-40mm f/4L USM | EF17-40mm F4L USM Instruction Manual - Page 6
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 - Canon EF 17-40mm f/4L USM | EF17-40mm F4L USM Instruction Manual - Page 7
the distance indicator on the distance scale. For accurate manual focusing on subjects at infinity distance, look through the 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 - Canon EF 17-40mm f/4L USM | EF17-40mm F4L USM Instruction Manual - Page 8
mark. The hood can be reverse-mounted on the lens for storage. 24 • 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). • Part of the picture - Canon EF 17-40mm f/4L USM | EF17-40mm F4L USM Instruction Manual - Page 9
the rear of the lens. Cut the gelatin filter to use a gelatin filter, ghosting may appear in the image. EF12 II EF25 II 17mm 40mm 17mm 40mm Camera-to-Subject Distance (mm) Magnification Near Far Near Far 155 159 0.83× 0.70× 206 271 0.59× 0.32× Incompatible 196 218 1.02× 0.70× Manual - Canon EF 17-40mm f/4L USM | EF17-40mm F4L USM Instruction Manual - Page 10
) 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 - Canon EF 17-40mm f/4L USM | EF17-40mm F4L USM Instruction Manual - Page 11
/Aperture Lens Construction 17 - 40 mm f/4 9 groups, 12 elements Minimum Aperture f/22 Angle of View 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 - Canon EF 17-40mm f/4L USM | EF17-40mm F4L USM Instruction Manual - Page 12
CT1-7546-006 © CANON INC. 2003 2009.7
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EF17-40mm f/4L USM
Instruction
ENG