More night sky practice… Here’s a 40-minute star trail image made on a recent moonless night, looking northeast from a campsite near Harden Flat, in Tuolumne County, California. You can’t see the effect in this small-sized image, but I’ve figured out how to remove a few thousand hot pixels (long-exposure noise on a warm night) from stacked images in just a few easy steps. More on that in another post soon.
Star Trails over Tuolumne County
(10 exposures, each 4 minutes, ISO 200, f/5.6, stacked in Photoshop
using lighten mode to yield 40-minute star trails.)
And here’s a bit of the Milky Way from the same location (a much shorter exposure at a much higher ISO).
(40 seconds, f/5.6, ISO 6400. Long-exposure noise reduction: on.
High-ISO noise reduction: high.)
Tim Messick Photography • Graphics
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