Dörr Danubia Reversing Lens 1.5x/1 1/4", 566579

Inversion lens for earth observations. The inversion lens has a diameter of 1.25 inches and is simply placed between the telescope and the eyepiece. A telescope produces an inverted and upside-down image. This is not an issue for astronomical observations. However, if you want to use the telescope for terrestrial observations as well, this representation can be distracting. The DÖRR inversion lens solves this problem and presents the image upright and correctly oriented. This allows for the observation of distant objects on Earth, such as ships at sea or faraway mountain peaks. Additionally, the image is magnified by a factor of 1.5.