Plants from Backpacking. 0FqvS.jpg (1280×1024) 5089756775_c1cd79d9e5_b.jpg (1024×685) g9zaU.jpg (2560×1600) WruxT.jpg (1600×1200) KICe6.jpg (2400×1200) Bmgoau.cwahi.net/heic0602a.html.
The Making of a Mind-Blowing DIY Sun Photo | Wired Science This stunning portrait of the sun spread like hot plasma all over the internet yesterday. Wired.com spoke with artist and astrophotographer Alan Friedman to find out how he made it. Friedman shoots the sky from his backyard in downtown Buffalo, New York. That means the usual celestial candidates — galaxies, nebulae, distant star clusters — are washed out by the glow of the city. But the sun is fair game, as long as the sky is clear and turbulence-free.
“I don’t care about sky glow at all,” Friedman said. On Oct. 20, Friedman hooked his telescope to a hydrogen-alpha filter, which selects a tiny slice of the visible light spectrum. Until a few years ago, Friedman says, this kind of filter was only available for research-grade telescopes. Instead of just snapping a photo, Friedman took 90 seconds of streaming video and selected only the sharpest frames. Then he inverted the images, making all the dark spots light and the light spots dark. “This was a Halloween image,” he said. See Also: