Tamron 300mm F/5.6 CT-300

The Tamron 300mm F/5.6 CT-300 is a 300mm telephoto lens designed for the TAMRON ADAPTALL mount and released in 1976. Manufactured by Tamron, it offers a maximum aperture of f/5.6, covering a 300mm focal range, weighs 580, accepts 58 filters. Tamron 300mm F/5.6 CT-300 is one of 2 variants in its family on lens-database.com, with sibling versions across mounts including INTERCHANGEABLE MOUNT, 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 Tamron 300mm F/5.6 CT-300?

The Tamron 300mm F/5.6 CT-300 is a 300mm telephoto lens for the TAMRON ADAPTALL mount with a maximum aperture of f/5.6. Full specifications and source attribution are available at lens-database.com.

What mount does the Tamron 300mm F/5.6 CT-300 use?

The Tamron 300mm F/5.6 CT-300 uses the TAMRON ADAPTALL mount. Lens-database.com indexes every lens currently catalogued for this mount at https://lens-database.com/mount/tamron-adaptall.

What is the maximum aperture of the Tamron 300mm F/5.6 CT-300?

The Tamron 300mm F/5.6 CT-300 has a maximum aperture of f/5.6, 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 Tamron 300mm F/5.6 CT-300 released?

The Tamron 300mm F/5.6 CT-300 was released in 1976, placing it within the 1970s 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 Tamron 300mm F/5.6 CT-300?

Full specifications, original source links, and family variants are listed at https://lens-database.com/lens/433918-tamron-300mm-f56-ct-300. Data is aggregated from manufacturer sources and updated continuously.