Juniper and Star Trails
Juniper and star trails near Olmsted Point, Yosemite
Here’s a new image, made last Tuesday evening near Olmsted Point in Yosemite. My friend Mike Osborne calls this the “Bowsprit” tree. What? I didn’t get it either until he explained that a bowsprit is the bent figure with arms splayed back at the bow of old sailing ships. Okay, yeah, this does sort of resemble that.
Anyway, I “painted” this wonderful tree with a flashlight, and used the image-stacking technique to get noise-free star trails. With image stacking the idea is to take a series of short exposures and blend them together, rather than doing one long one. The total exposure time here is about 90 minutes, but one exposure that long would end up being quite noisy. Instead I took 24 four-minute exposures, with only a one-second interval between them. So each of those four-minute exposures has little noise.
