Earth Day Full Moon Arc
Taken by John Ashley on April 22, 2016 @
Lewistown, Montana
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Camera Used: NIKON CORPORATION NIKON D750
Exposure Time: 30/1
Aperture: f/1.0
ISO: 500
Date Taken: 2016:04:25 00:16:06
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Details:
Earth Day 2016, from moon rise to moon set over the Spring Creek railroad trestle, near Lewistown, Montana. This is an interval photograph, with the full moon photographed every three minutes from about 8:38 p.m. until 6:30 a.m. the next morning. Combining the frames shows you the moon's dusk to dawn path across the night sky. It was a micro-moon, the smallest full moon of 2016.
I don't photograph man-made structures very often, but the full moon passing over this old trestle was too challenging to pass up. The bridge was completed in 1913 by the Chicago, Milwaukee, St. Paul and Pacific Railroad. It's a "single track gauntleted trestle," 1,300 feet long and 80 feet high over the creek. The company filed for bankruptcy in 1977 and was eventually sold in 1985. The Spring Creek trestle was deemed unsafe for use in the 1980's, and ponderosa pine trees now grow between the rails just east of the trestle.
To create this image, I set my Nikon's built-in intervalometer to record one image every minute. This gave me some flexibility if clouds rolled in. And roll they did. Between about one and three a.m., I had to continuously adjust the shutter speed between 1/500th sec and 2 seconds to expose the moon through broken clouds. When the full moon reached its central equinox, I made a 20-second exposure to capture the clouds and create the flare, the bridge shadow, and highlights on the creek. My 14mm Rokinon fisheye lens created some distortion in the lower timbers (and in some of the end moons), but I chose to keep the track level straight during editing.
Nikon D750, Rokinon 14mm lens, various exposure settings.
Photographer's website:
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