Time-lapse images moving Yosemite views  had to go higher. He needed to see what worlds opened up on the next peak.

Delehanty and his 21-year-old photography partner, Sheldon Neill, earned Internet acclaim this year when they released their online video project, “Yosemite HD.” The pair used time-lapse imagery – playing through hundreds of still pictures like a flip book – to showcase the changing environment in a way the naked eye could never perceive: shadow and light dancing across the landscape, clouds shape-shifting through the sky, stars circling over the horizon.

He and his party had spent a September morning climbing 1,500 vertical feet of switchbacks from the floor of Yosemite’s Lyell Canyon, edging up the shoulder of Potter Point along a well-maintained trail. But near the top of the tree line, they struck off into unmarked terrain, guided only by a goal: up.

Delehanty, a 25-year-old photographer from Burlingame, had spotted the hint of a High Sierra vista. But once there, he saw something higher, more promising still. And on it went.

Dimming light and dwindling water eventually convinced most of the group to turn around. But Delehanty shouldered his pack and stepped onto the saddle leading to the next peak. He would spend hours on top, setting up special camera equipment to capture the setting sun and rising moon – alone, in the cold, as storm clouds gathered.

“Determination,” he had answered on the hike up, when asked what separated his work from others.

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