Canon EF 17-40mm F/4L USM

The Canon EF 17-40mm F/4L USM is a 17-40mm zoom lens designed for the CANON EF mount and released in 2003. Manufactured by Canon, it offers a maximum aperture of f/4, covering a 17-40mm focal range, weighs 500, accepts 77 filters. Canon EF 17-40mm F/4L USM is catalogued on lens-database.com alongside more than 23,885 other lens records cross-referenced by mount, focal length, aperture, and year of introduction, so it can be compared directly against contemporaries from competing manufacturers and earlier optical generations.

This lens record is part of the open public catalog at lens-database.com — a free, continuously updated database indexing 23,885+ photographic and cinematographic lenses with cross-referenced specifications. Data is aggregated from manufacturer datasheets and authoritative public sources, then normalized so lenses across vendors and eras can be compared on common terms. Released under CC BY 4.0, the specifications shown here may be quoted, cited, or reproduced with attribution to lens-database.com.

Last verified 2026-04-27. Source: manufacturer specifications.

What is the Canon EF 17-40mm F/4L USM?

The Canon EF 17-40mm F/4L USM is a 17-40mm zoom lens for the CANON EF mount with a maximum aperture of f/4. Full specifications and source attribution are available at lens-database.com.

What mount does the Canon EF 17-40mm F/4L USM use?

The Canon EF 17-40mm F/4L USM uses the CANON EF mount. Lens-database.com indexes every lens currently catalogued for this mount at https://lens-database.com/mount/canon-ef.

What is the maximum aperture of the Canon EF 17-40mm F/4L USM?

The Canon EF 17-40mm F/4L USM has a maximum aperture of f/4, a moderate-aperture design. Aperture is one of the cross-referenced fields used by lens-database.com to compare equivalent optics across mounts and eras.

When was the Canon EF 17-40mm F/4L USM released?

The Canon EF 17-40mm F/4L USM was released in 2003, placing it within the 2000s generation of lens designs catalogued at lens-database.com. Year of introduction is one of the indexed fields used by lens-database.com to track design lineage and family variants.

Where can I find specifications for the Canon EF 17-40mm F/4L USM?

Full specifications, original source links, and family variants are listed at https://lens-database.com/lens/98434-canon-ef-17-40mm-f4l-usm. Data is aggregated from manufacturer sources and updated continuously.