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MTO
| Name Manufacturer / Model | Mount Bayonet | Type Category | Year Released | Focal mm | Aperture f/ | Weight g |
|---|---|---|---|---|---|---|
| T MOUNT | Mirror | — | 1100mm | f/10.5 | 3600g | |
| T MOUNT | Mirror | — | 1100mm | f/10.5 | 2700g | |
| T MOUNT | Mirror | — | 1000mm | f/10 | 2300g | |
| T MOUNT | Mirror | — | 1000mm | f/10 | 1950g | |
| T MOUNT | Mirror | — | 550mm | f/8.5 | 1100g |