Vanguard Endeavor ED II 8320 binoculars
The diopter correction can be blocked so you never inadvertently change the setting of your binoculars. The subtle green lines show whether the ring is locked or not. Focusing goes quickly and is possible to infinity in 450 degrees.
The body is made of lightweight magnesium. Solid and intended for heavy use, while wearing comfort is not affected. The rubber coating also contributes to your comfort.
Vanguard has so much confidence in the Endeavor ED II series that they give a Premium lifetime warranty.