Patent ID: 8786947

Claim:
A far-optical device comprising: a central tube disposed between an objective and an eyepiece and the central tube having a maximum outside diameter of about 35 mm; a reversal system disposed within the central tube and an optical magnification means integrated into the reversal system so that the optical magnification means and the reversal system are provided in one component; wherein the reversal system comprises a first optical element and a second optical element and the first optical element and the second optical element are movable relative to the central tube, and wherein by displacement of the first optical element and the second optical element of the reversal system an intermediate image produced in an objective-side image plane is reproduced with a changeable imaging scale and in an upright position at an eyepiece − side image plane and with an adjustable optical magnification having a zoom greater than four times; and an optical beam deflection means integrated into the reversal system forming a third optical element and disposed on a side of the reversal system facing the eyepiece, wherein at a maximum magnification of the far-optical device a total focal length for the reversal system is at most 11 mm, wherein the optical beam deflection means has a refractive power of between −20 dpt and −40 dpt.