My friend is a hunter, he had a lot of binoculars,
everything that is mentioned here.
For the last 5 years he has only used Sightron.
By quality and reliability is not inferior to more
expensive Zeiss and Leica
But it's best to watch with your own eyes,
even better to check the binoculars before buying at dusk.
I have a book, I think it can be downloaded on the Internet
in English "Precision shooting at 1000 yards" Dave Brennan.
I'm not a professional shooter, but there I learned a lot
of interesting things about optics, maybe it will be useful