Sigmatel / Sigma-XQ MF 135mm F/1.8

The Sigmatel / Sigma-XQ MF 135mm F/1.8 is a 135mm portrait lens designed for the SIGMA Y-S mount and released in 1972. Manufactured by Sigma, it offers a maximum aperture of f/1.8, covering a 135mm focal range, weighs 765, accepts 77 filters. Sigmatel / Sigma-XQ MF 135mm F/1.8 is one of 2 variants in its family on lens-database.com, with sibling versions across mounts including INTERCHANGEABLE MOUNT, 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 2026-07-27. Source: manufacturer specifications.

What is the Sigmatel / Sigma-XQ MF 135mm F/1.8?

The Sigmatel / Sigma-XQ MF 135mm F/1.8 is a 135mm portrait lens for the SIGMA Y-S mount with a maximum aperture of f/1.8. Full specifications and source attribution are available at lens-database.com.

What mount does the Sigmatel / Sigma-XQ MF 135mm F/1.8 use?

The Sigmatel / Sigma-XQ MF 135mm F/1.8 uses the SIGMA Y-S mount. Lens-database.com indexes every lens currently catalogued for this mount at https://lens-database.com/mount/sigma-y-s.

What is the maximum aperture of the Sigmatel / Sigma-XQ MF 135mm F/1.8?

The Sigmatel / Sigma-XQ MF 135mm F/1.8 has a maximum aperture of f/1.8, a fast-aperture optic well-suited to low-light work. Aperture is one of the cross-referenced fields used by lens-database.com to compare equivalent optics across mounts and eras.

When was the Sigmatel / Sigma-XQ MF 135mm F/1.8 released?

The Sigmatel / Sigma-XQ MF 135mm F/1.8 was released in 1972, placing it within the 1970s 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 Sigmatel / Sigma-XQ MF 135mm F/1.8?

Full specifications, original source links, and family variants are listed at https://lens-database.com/lens/411090-sigmatel-sigma-xq-mf-135mm-f18. Data is aggregated from manufacturer sources and updated continuously.