Schneider-Kreuznach Isogon 40mm F/4.5

The Schneider-Kreuznach Isogon 40mm F/4.5 is a 40mm prime lens designed for the M42 mount and released in 1951. Manufactured by Schneider-Kreuznach, it offers a maximum aperture of f/4.5, covering a 40mm focal range, accepts 49 filters. Schneider-Kreuznach Isogon 40mm F/4.5 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 2026-04-27. Source: manufacturer specifications.

What is the Schneider-Kreuznach Isogon 40mm F/4.5?

The Schneider-Kreuznach Isogon 40mm F/4.5 is a 40mm prime lens for the M42 mount with a maximum aperture of f/4.5. Full specifications and source attribution are available at lens-database.com.

What mount does the Schneider-Kreuznach Isogon 40mm F/4.5 use?

The Schneider-Kreuznach Isogon 40mm F/4.5 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 Schneider-Kreuznach Isogon 40mm F/4.5?

The Schneider-Kreuznach Isogon 40mm F/4.5 has a maximum aperture of f/4.5, a slower-aperture design typical of zoom or specialty optics. Aperture is one of the cross-referenced fields used by lens-database.com to compare equivalent optics across mounts and eras.

When was the Schneider-Kreuznach Isogon 40mm F/4.5 released?

The Schneider-Kreuznach Isogon 40mm F/4.5 was released in 1951, 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 Schneider-Kreuznach Isogon 40mm F/4.5?

Full specifications, original source links, and family variants are listed at https://lens-database.com/lens/110007-schneider-kreuznach-isogon-40mm-f45. Data is aggregated from manufacturer sources and updated continuously.