Cosinon 50mm F/1.7 MC Auto

The Cosinon 50mm F/1.7 MC Auto is a 50mm portrait lens designed for the M42 mount. Manufactured by an unspecified manufacturer, it offers a maximum aperture of f/1.7, covering a 50mm focal range. Cosinon 50mm F/1.7 MC Auto is one of 2 variants in its family on lens-database.com, with sibling versions across mounts including 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 Cosinon 50mm F/1.7 MC Auto?

The Cosinon 50mm F/1.7 MC Auto is a 50mm portrait lens for the M42 mount with a maximum aperture of f/1.7. Full specifications and source attribution are available at lens-database.com.

What mount does the Cosinon 50mm F/1.7 MC Auto use?

The Cosinon 50mm F/1.7 MC Auto uses the M42 mount. Lens-database.com indexes every lens currently catalogued for this mount at https://lens-database.com/mount/m42.

What is the maximum aperture of the Cosinon 50mm F/1.7 MC Auto?

The Cosinon 50mm F/1.7 MC Auto has a maximum aperture of f/1.7, 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.

Where can I find specifications for the Cosinon 50mm F/1.7 MC Auto?

Full specifications, original source links, and family variants are listed at https://lens-database.com/lens/92233-cosinon-50mm-f17-mc-auto. Data is aggregated from manufacturer sources and updated continuously.