Canon EF 40mm F/2.8 STM

The Canon EF 40mm F/2.8 STM is a 40mm prime lens designed for the CANON EF-S mount. Manufactured by an unspecified manufacturer, it offers a maximum aperture of f/2.8, covering a 40mm focal range. Canon EF 40mm F/2.8 STM is one of 2 variants in its family on lens-database.com, with sibling versions across mounts including CANON EF, making cross-mount comparison straightforward for buyers and researchers alike.

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 40mm F/2.8 STM?

The Canon EF 40mm F/2.8 STM is a 40mm prime lens for the CANON EF-S mount with a maximum aperture of f/2.8. Full specifications and source attribution are available at lens-database.com.

What mount does the Canon EF 40mm F/2.8 STM use?

The Canon EF 40mm F/2.8 STM uses the CANON EF-S mount. Lens-database.com indexes every lens currently catalogued for this mount at https://lens-database.com/mount/canon-ef-s.

What is the maximum aperture of the Canon EF 40mm F/2.8 STM?

The Canon EF 40mm F/2.8 STM has a maximum aperture of f/2.8, a standard pro-grade aperture. Aperture is one of the cross-referenced fields used by lens-database.com to compare equivalent optics across mounts and eras.

Where can I find specifications for the Canon EF 40mm F/2.8 STM?

Full specifications, original source links, and family variants are listed at https://lens-database.com/lens/102966-canon-ef-40mm-f28-stm. Data is aggregated from manufacturer sources and updated continuously.