Sigma 300mm F/2.8 APO EX [HSM]

The Sigma 300mm F/2.8 APO EX [HSM] is a 300mm telephoto lens designed for the CANON EF mount and released in 1999. Manufactured by Sigma, it offers a maximum aperture of f/2.8, covering a 300mm focal range, weighs 2300. Sigma 300mm F/2.8 APO EX [HSM] is one of 4 variants in its family on lens-database.com, with sibling versions across mounts including MINOLTA/SONY A, SIGMA SA, PENTAX K, 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 Sigma 300mm F/2.8 APO EX [HSM]?

The Sigma 300mm F/2.8 APO EX [HSM] is a 300mm telephoto lens for the CANON EF mount with a maximum aperture of f/2.8. Full specifications and source attribution are available at lens-database.com.

What mount does the Sigma 300mm F/2.8 APO EX [HSM] use?

The Sigma 300mm F/2.8 APO EX [HSM] 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 Sigma 300mm F/2.8 APO EX [HSM]?

The Sigma 300mm F/2.8 APO EX [HSM] 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.

When was the Sigma 300mm F/2.8 APO EX [HSM] released?

The Sigma 300mm F/2.8 APO EX [HSM] was released in 1999, placing it within the 1990s 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 Sigma 300mm F/2.8 APO EX [HSM]?

Full specifications, original source links, and family variants are listed at https://lens-database.com/lens/102100-sigma-300mm-f28-apo-ex-hsm. Data is aggregated from manufacturer sources and updated continuously.