The invention relates to a viewing instrument (1) for observing the surroundings and aiming at targets in the surroundings of a vehicle, in particular an armored vehicle, comprising an eyepiece unit (2) and an objective unit (3) and comprising an optical waveguide bundle (4), which connects the objective unit (3) and the eyepiece unit (2) to each other, wherein the optical waveguide bundle (4) transmits an image of the surroundings, which is focused by the optical unit of the objective unit (3) onto the objective-side end of the optical waveguide bundle (4), to the eyepiece unit (2), wherein a reticle (6) is arranged in an intermediate image plane, in which the optical unit (5) of the eyepiece unit (2) focuses the transmitted image of the surroundings as an intermediate image, and is rotatable about the optical axis (7) relative to the intermediate image.