Patent ID: 8432610

Claim:
An optical sight comprising: a first imaging group comprising: an optical path; an objective lens group lying on the optical path, wherein the objective lens group includes at least a first objective lens; and an eyepiece lens group lying on the optical path, wherein the first imaging group forms a first image having a first magnification on the optical path at an image location and the first imaging group has a first field of view and a first eye relief distance; a second imaging lens group; and a tumbler mechanism upon which the second imaging lens group is mounted, wherein the tumbler mechanism controllably rotates the second imaging lens group about a tumbler axis perpendicular to the optical path to controllably insert and remove the second imaging lens group from the optical path, wherein upon insertion of the second imaging lens group into the optical path, an optical combination of the first imaging group and the second imaging lens group forms a second image having a second magnification on the optical path at substantially the image location and the optical combination has a second field of view and a second eye relief distance, and wherein the first and second imaging groups are configured such that the first and second eye relief distances are substantially equal, wherein the tumbler mechanism comprises a frame having an opening through which the optical path passes when the tumbler mechanism is rotated so that the second imaging lens group is removed from the optical path, wherein the second imaging lens group comprises a first doublet lens opposite to a second doublet lens; and wherein the optical sight is configured to display only one of the first image and the second image at any time.