Canon EF 17-40mm f/4.0L USM
The EF17-40mm f/4L USM was developed as high-end version of the highly acclaimed EF20-35mm f/3.5-4.5 USM lens released in March 1993. Designed for use by professional and amateur users alike, this lens realizes the outstanding image resolution that distinguishes an L-series lens while retaining high cost performance. Featuring a new optical system design, the new lens delivers an expanded zoom range of 17-40mm, with the wide-angle-end 17mm focal length making it ideally suited to digital photography.
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