Samyang Reflex 300mm F/6.3 ED UMC CS

The Samyang Reflex 300mm F/6.3 ED UMC CS is a 300mm mirror lens designed for the CANON EF-M mount and released in 2014. Manufactured by Samyang, it offers a maximum aperture of f/6.3, covering a 300mm focal range, weighs 260, accepts 25.5 filters. Samyang Reflex 300mm F/6.3 ED UMC CS is one of 4 variants in its family on lens-database.com, with sibling versions across mounts including SONY E, MICRO 4/3, FUJIFILM X, 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 2026-06-11. Source: manufacturer specifications.

What is the Samyang Reflex 300mm F/6.3 ED UMC CS?

The Samyang Reflex 300mm F/6.3 ED UMC CS is a 300mm mirror lens for the CANON EF-M mount with a maximum aperture of f/6.3. Full specifications and source attribution are available at lens-database.com.

What mount does the Samyang Reflex 300mm F/6.3 ED UMC CS use?

The Samyang Reflex 300mm F/6.3 ED UMC CS uses the CANON EF-M mount. Lens-database.com indexes every lens currently catalogued for this mount at https://lens-database.com/mount/canon-ef-m.

What is the maximum aperture of the Samyang Reflex 300mm F/6.3 ED UMC CS?

The Samyang Reflex 300mm F/6.3 ED UMC CS has a maximum aperture of f/6.3, 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 Samyang Reflex 300mm F/6.3 ED UMC CS released?

The Samyang Reflex 300mm F/6.3 ED UMC CS was released in 2014, placing it within the 2010s 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 Samyang Reflex 300mm F/6.3 ED UMC CS?

Full specifications, original source links, and family variants are listed at https://lens-database.com/lens/108162-samyang-reflex-300mm-f63-ed-umc-cs. Data is aggregated from manufacturer sources and updated continuously.