Optically, the Schmidt and Bender 4x36 trumps the Leupy 4x by a wide margin. Just bought a Zeiss Conquest 4x and it is excellent too, with awesome eye relief. Haven't compared the Zeiss to any others, but it sure looks good to me optically. As Sav 99 said, it is no doubt better than the Leupy 4x, I just haven't compared the two.
