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Celestron
| Name Manufacturer / Model | Mount Bayonet | Type Category | Year Released | Focal mm | Aperture f/ | Weight g |
|---|---|---|---|---|---|---|
Celestron300mm F/5.6 Mirror | T MOUNT | Mirror | 1981 | 300mm | f/5.6 | 260g |
Celestron500mm F/8 Mirror MC | T MOUNT | Mirror | — | 500mm | f/8 | 400g |
Celestron500mm F/8 Mirror Multi-Coated | T MOUNT | Mirror | — | 500mm | f/8 | 400g |
| T MOUNT | Mirror | — | 1250mm | f/13.9 | — |