Teikoku Kogaku / Zunow Opt. Zunow 50mm F/1.1 [II] LSM

The Teikoku Kogaku / Zunow Opt. Zunow 50mm F/1.1 [II] LSM is a 50mm portrait lens designed for the M39 mount and released in 1955. Manufactured by Teikoku, it offers a maximum aperture of f/1.1, covering a 50mm focal range, weighs 445. Teikoku Kogaku / Zunow Opt. Zunow 50mm F/1.1 [II] LSM 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 2026-04-28. Source: AI-assisted summary, verify against linked manufacturer sources.

What is the Teikoku Kogaku / Zunow Opt. Zunow 50mm F/1.1 [II] LSM?

The Teikoku Kogaku / Zunow Opt. Zunow 50mm F/1.1 [II] LSM is a 50mm portrait lens for the M39 mount with a maximum aperture of f/1.1. Full specifications and source attribution are available at lens-database.com.

What mount does the Teikoku Kogaku / Zunow Opt. Zunow 50mm F/1.1 [II] LSM use?

The Teikoku Kogaku / Zunow Opt. Zunow 50mm F/1.1 [II] LSM uses the M39 mount. Lens-database.com indexes every lens currently catalogued for this mount at https://lens-database.com/mount/m39.

What is the maximum aperture of the Teikoku Kogaku / Zunow Opt. Zunow 50mm F/1.1 [II] LSM?

The Teikoku Kogaku / Zunow Opt. Zunow 50mm F/1.1 [II] LSM has a maximum aperture of f/1.1, placing it in the ultra-fast lens category. Aperture is one of the cross-referenced fields used by lens-database.com to compare equivalent optics across mounts and eras.

When was the Teikoku Kogaku / Zunow Opt. Zunow 50mm F/1.1 [II] LSM released?

The Teikoku Kogaku / Zunow Opt. Zunow 50mm F/1.1 [II] LSM was released in 1955, placing it within the 1950s 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 Teikoku Kogaku / Zunow Opt. Zunow 50mm F/1.1 [II] LSM?

Full specifications, original source links, and family variants are listed at https://lens-database.com/lens/947696-teikoku-kogaku-zunow-opt-zunow-50mm-f11-ii-lsm. Data is aggregated from manufacturer sources and updated continuously.