No offense to anyone, or to Vortex binos... I've heard they are fine. But, I'd put the Swift Audubon 8.5 x 44 roof prisms up against anything on the planet!(as posted on product reviews last month.) I've owned some of the best names in optics, and can now put aside the snob appeal. Compared these to binos I used on sheep and goat hunts in the Rockies, and have made my decision: the Swift Audubon is equivalent to the best there is, and it has a major advantage. It's only about $350, but you've gotta go to way over a thousand $ to match it. It has a warranty- maybe not as great as some.....but, I'm gonna have a couple of pair of them, for a fraction..... Give it a thought, at least.