As someone in here already said, I think there is more difference in people's eyes than glass. I personally use just a cheap pair of $379 bushnell 10x42 binos from about 10 years ago and my friend at the same time bought a $1000 pair of 10x42 zeiss. I have looked through his side by side with mine on numerous occasions over the years and I can see no real difference. In clarity and edge to edge. My bushnells actually seem a touch brighter to me. He says he can tell a big difference but to me, no difference. So that tells me with my eyes, I'd probably waste my money buying an expensive pair.