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Older commercial 100mm bino layout
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| Poster: |
GlennLeDrew
(see all of this user's photos) |
| Description: |
An older commercial 100mm binocular design. Because of the f/3.5 objectives, the effective aperture is less than 90mm when any standard Porro prism is used. (By 'standard' I mean that both prisms in each Porro pair are of the same size, i.e., the first prism is not of the tapered or stepped form.) |
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