I bought these to have a single binocular/range finder for hunting western big game. I compared these to a Meopta MeoStar B.1.1 and a Swarovski SLC 10x42 and the optics among the 3 are indistinguishable. No aberration and the color and clarity are great. The Leica are slightly heavier and larger, and the range-finding function is basic, but includes line of sight and horizontal distance functions. Overall, great optics and a functional range finder with slightly more bulk than binoculars without range-finding capability.