| 摘要 |
The invention relates to a visual aid in the form of telescopic spectacles with two lens systems, each of which comprises at least one objective (70) and one ocular (71). An automatic focussing device that modifies the focal length of the lens system in order to focus the same according to the distance from the telescopic spectacles to the object is allocated to the lens systems. A device for modifying the enlargement factor by modifying the focal length ("zoom") and a device for adapting the parallax between the lens systems of the visual aid to the focal length that is adjusted according to the distance of the telescopic spectacles from the object are also allocated to the lens systems. The parallax is adapted with adjustable optical elements (11) which are provided in the beam path of the lens systems and with which it is possible to alter the angle (13) between the beam parts (14) extending from the lens systems (1) to the object. 58 claims, 11 figures
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