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Canon 8806A002 manual

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Table of contents for the manual

  • Page 1

    EF17-40mm f/4L USM Instruction ENG C OP Y[...]

  • Page 2

    ENG-1 Thank y ou f or purc hasing a Canon pr oduct. The Canon EF17-40mm f/4L USM is a high- performance wide-angle zoom lens. • “USM” stands for Ultr asonic Motor . Features 1. T wo aspherical elements and a Super UD element result in outstanding image delineation. 2. Ultrasonic motor (USM) f or quick and quiet autofocusing. 3. Manual f ocusi[...]

  • Page 3

    ENG-2 a Safety Precautions 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 attac[...]

  • Page 4

    ENG-3 Nomenc lature Distance scale ( → 6) Focus mode switch ( → 5) Lens mount index ( → 4) Contacts ( → 4) Hood mount ( → 7) Focusing ring ( → 5) Gelatin filter holder ( → 8) Filter mounting thread ( → 7) Zoom ring ( → 5) F or detailed inf ormation, reference page numbers are pro vided in parentheses ( → **). C OP Y[...]

  • Page 5

    ENG-4 See your camera’ s instructions for details on mounting and detaching the lens. 1. Mounting and Detaching the Lens The lens mount has a rubber ring for enhanced w ater- and dust-resistance. The r ubber ring may cause slight abrasions around the camera's lens mount, but this will not cause any prob lems. If the rub ber ring becomes wor [...]

  • Page 6

    ENG-5 3. Zooming To z oom, turn the lens’ zoom ring. Be sure to finish zooming bef ore focusing. Changing the zoom ring after focusing can aff ect the focus . To shoot in autofocus (AF) mode , set the focus mode switch to AF . To use only manual f ocusing (MF), set the focus mode switch to MF , and focus b y turning the f ocusing ring. The focusi[...]

  • Page 7

    ENG-6 4. Infinity Compensation Mark To compensate f or 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 mar k is aligned with the distance indicator on the distance scale. F or accur ate manual focusing on subjects at infinity [...]

  • Page 8

    ENG-7 24 Y ou can attach filters to the filter mounting thread on the front of the lens. 7. Filters (Sold separately) •T o ensure dust- and water-resistant performance, attach a Canon PR OTECT filter (77mm). • Only one filter may be attached. • If you need a polarizing filter , use the Canon Circular P olarizing Filter (77mm). 6. Hood The EW [...]

  • Page 9

    ENG-8 There is a gelatin filter holder at the rear of the lens. Cut the gelatin filter to fit within the white frames. Then inser t the gelatin filter into the filter holder . 8. Filter Holder • Only one filter can be used. • When you use a gelatin filter , ghosting may appear in the image. Y ou can attach Extension T ube EF12 II or EF25 II for[...]

  • Page 10

    ENG-9 10. Close-up Lenses (Sold separately) Attaching a 500D (77mm) Close-up Lens enables close-up photogr aphy . The magnification will be as follo ws: • 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 f ocusing is recommended for accurate[...]

  • Page 11

    ENG-10 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’ V er tical: 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[...]

  • Page 12

    © CANON INC. 2003 CT1-8513-004 0812Ni C OP Y[...]