Thanks to both of you for taking your time in criticizing this picture.
The comments are both relevant. My idea was to isolate the tree from the surrounding trees and having the bare rocks as background. However, I could not back up because I was already on the edge of a canyon and there were too many trees around it to take thepciture at a wider angle.
When I think about it now, I have the feeling that maybe I was too much in a rush. I don't know if it happens to you, but when I'm hiking I found more difficult to concentrate on the picture. In this particular trip, we were hiking for 5 hours, going from 800 meters up to 2400. I was tired of carring my backpack with the equipment. Plus, I have always the pressure to reach my destination on time.
I remember reading an essay by Alain Briot, about a friend of him who was photographing the Grand Canyon. Alain said that his friend's pictures taken on the rim were always better than the ones taken when he was hiking inside the it. And this because on the rim he was more concentrated on the subject than on the trail.
But maybe this could be the topic of another post... Which is your approach to photography while hiking!
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