Basic binoculars have halos, rainbows, distortions at the edges and sometimes double images. They are dark to look through, the focus knob sticks and goes, and everything that sits on a branch beyond sundown becomes a silhouette, blurred if it is less than ten metres away. When you adjust for your eyes one at a time you have to remember what the other one saw, and by the time you have regained your vision the bird has flown away. With all these factors you feel you are "looking through binoculars" and sometimes just put them down and do better without. Fast forward to the Zeiss Vistory HT 10 x 42 binoculars. Rather than "looking through binoculars" you are teleported to the scene. Its real, bright and crystal clear. If you are watching some lions on a **** you can inspect the buffalo sinew between the lions teeth, note the unique markings on his face, and feel so close that his breath is of immediate concern. You keep very still - because you are not safe - how can you be when you are just two feet from the lion's jaws? Focus and follow a dot in the sky and you will get conclusive ID on a bird of prey. Take a look at a sacred ibis with the late afternoon sun shining on its feathers and the clarity will be etched on your mind. Enjoy the detail and vibrant colours of a butterfly's wings from two metres. And dont hesitate to use them at night. They extend your vision into the night with enduring clarity. Were they expensive? I cant remember!