I first heard of Opus Orange when I stumbled upon a documentary about the John Muir Trail titled "Mile . . . Mile and a Half" which is really worth checking out, especially if you're into hiking and nature. The documentary is beautifully shot using Nikon D800s (I think) and GoPros. The primarily instrumental soundtrack compliments the scenery perfectly, partially because Paul Bessenbacher was along fort the journey and experienced it firsthand, which I'm sure really helped contribute to the composing process. You can check out 2 of the tracks on their site, listen to the full album on Spotify, or purchase it on iTunes or Amazon.
Here's a random video thrown together by my friend Jozias compiled of video footage shot with our Nikon D7000s during a camping trip last year.