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    Top Deal Review - Canon EF 17-40mm f 4L USM Ultra Wide ...

    bonizolnak

    โดย bonizolnak

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    Top Deal Review - Canon EF 17-40mm f 4L USM Ultra Wide Angle Zoom Lens for Canon SLR Cameras

    Technical Details
    17-40mm ultra-wide-angle zoom lens with f/4 maximum aperture for Canon SLR cameras
    3 aspherical lens elements and super UD glass element create superior optics in all conditions
    Powerful ring-type ultra-sonic monitor (USM) produces fast and silent autofocusing
    Focuses as close as 11 inches; supports screw-in 77mm filters or up to 3 gel filters
    Weather-resistant construction; measures 3.3 inches in diameter; 1-year warranty