| 摘要 |
<p>An optical sighting device and a method of providing magnification in the optical sighting device are disclosed. In one example, the optical sighting device comprises a first telescope including a first focal plane, a second telescope, comprising a first variable power lens group, a second variable power lens group, and a second focal plane positioned between the first and second variable power lens groups, and a rotary optical tumbler comprised of a Galilean telescope configured to rotate into and out of a optical path that extends through the first telescope, the Galilean telescope and the second telescope, the rotation being about an axis disposed relative to the optical path.</p> |
