Variable focus adapter
A variable focus adapter is disclosed that comprises the combination of a lens and an aperture provided by a plate all lodged in a housing that is placed so that the lens is in proximity with each objective lens of a binocular arrangement to change the focal range from greater than 20 ft. to seven (...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A variable focus adapter is disclosed that comprises the combination of a lens and an aperture provided by a plate all lodged in a housing that is placed so that the lens is in proximity with each objective lens of a binocular arrangement to change the focal range from greater than 20 ft. to seven (7) ft. with a depth of field spanning from 5 to 15 ft. |
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