Samyang 300mm F/6.3 CS ED Reflex UMC

The Samyang 300mm F/6.3 CS ED Reflex UMC is a 300mm mirror lens designed for the CANON EF-M mount and released in 2013. Manufactured by Samyang, it offers a maximum aperture of f/6.3, covering a 300mm focal range, weighs 318. Samyang 300mm F/6.3 CS ED Reflex UMC is one of 3 variants in its family on lens-database.com, with sibling versions across mounts including FUJIFILM X, SONY E, 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 Samyang 300mm F/6.3 CS ED Reflex UMC?

The Samyang 300mm F/6.3 CS ED Reflex UMC 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 300mm F/6.3 CS ED Reflex UMC use?

The Samyang 300mm F/6.3 CS ED Reflex UMC 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 300mm F/6.3 CS ED Reflex UMC?

The Samyang 300mm F/6.3 CS ED Reflex UMC 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 300mm F/6.3 CS ED Reflex UMC released?

The Samyang 300mm F/6.3 CS ED Reflex UMC was released in 2013, 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 300mm F/6.3 CS ED Reflex UMC?

Full specifications, original source links, and family variants are listed at https://lens-database.com/lens/205135-samyang-300mm-f63-cs-ed-reflex-umc. Data is aggregated from manufacturer sources and updated continuously.