Its performance characteristics speak for themselves: 25-50 WW ASPH. with a subjective field of view of more than 60 throughout the entire zoom range, ensuring that Leica enables viewing experiences that are unique on this scale. Its interchangeable bayonet mount features an integrated automatic eyepiece lock that fixes all eyepieces securely to the scope. Thanks to the construction of the optical system, the eyepiece's focal length is now also independent of the 65 mm or 82 mm scope being used, and is retained when eyepieces are changed. The eyepiece has rubberised control elements and comfortable rotating eyecups, which significantly increases viewing comfort. As a result, the eyepiece provides optimum grip and is easy to handle even when wearing gloves. The eyepiece is also waterproof to a depth of 5 m / 16.5 ft, and also achieves top marks in the prevention of internal fogging thanks to its sophisticated nitrogen filling. The 25-50x WW ASPH. wide-angle zoom eyepiece is available both separately and in a set together with the Leica APO spotting scopes.