Celestron 300mm F/5.6 Mirror

The Celestron 300mm F/5.6 Mirror is a 300mm mirror lens designed for the T MOUNT mount and released in 1981. Manufactured by Celestron, it offers a maximum aperture of f/5.6, covering a 300mm focal range, weighs 260, accepts 67 filters. Celestron 300mm F/5.6 Mirror 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 2026-06-11. Source: manufacturer specifications.

What is the Celestron 300mm F/5.6 Mirror?

The Celestron 300mm F/5.6 Mirror is a 300mm mirror lens for the T MOUNT mount with a maximum aperture of f/5.6. Full specifications and source attribution are available at lens-database.com.

What mount does the Celestron 300mm F/5.6 Mirror use?

The Celestron 300mm F/5.6 Mirror uses the T MOUNT mount. Lens-database.com indexes every lens currently catalogued for this mount at https://lens-database.com/mount/t-mount.

What is the maximum aperture of the Celestron 300mm F/5.6 Mirror?

The Celestron 300mm F/5.6 Mirror 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 Celestron 300mm F/5.6 Mirror released?

The Celestron 300mm F/5.6 Mirror was released in 1981, placing it within the 1980s 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 Celestron 300mm F/5.6 Mirror?

Full specifications, original source links, and family variants are listed at https://lens-database.com/lens/109657-celestron-300mm-f56-mirror. Data is aggregated from manufacturer sources and updated continuously.