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It could be luck. It could be skill. Most often, it’s a combination of the two. That perfect mix of preparation and opportunity that leads to the “perfect” shot — a shot that wasn’t there a moment ago, and is gone by the time you’ve remembered to start breathing again.

This collection of 21 photographs is all about those moments. Those perfect, split-second moments that are so fleeting it’s amazing anybody was there with the camera and the wherewithal to capture it. But of course, someone was. And what’s more, they use 500px!