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| Select your trinocular port type from below |
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| C-Mount | Olympus Phototube | Olympus old type Phototube (*BH type, etc.) |
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| JIS Phototube (inside 23.2 mm) |
Nikon old type phototube *optiphot, etc. |
No Phototube attached |
| Olympus Phototube (U-SPT, etc.) installation |
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| Olympus Old-BH Type Phototube (BH Series, etc.) installation |
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| JIS Standard Phototube installation |
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| JNikon Phototube (F-type phototube) installation |
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