There is a fair amount of excitement building around the first total eclipse of the sun in the United States in 72 years, on August 21, 2017. Undoubtedly, millions of people will be attempting to view and photograph it, mostly with marginal success using their smartphone cameras.
My wife Abby and I have been planning for this for some time, and expect to include my sister Nicole and her husband Tracey. Our hope is to be in our mother’s home town, Park Hills, Missouri, (known as Flat River for most of her life) on the morning of the eclipse, to stake out a spot from which to witness, and photograph, this event.
Photographing a solar eclipse is challenging. I’ve never photographed, or even seen, one, though Abby and I have photographed several lunar eclipses, and many of the same principals apply.
Firstly, as you will read on most sites about the upcoming eclipse, don’t look directly at the sun, even for a second or two, and even if it is partially eclipsed by the moon. The only time it is safe to look at it with your naked eye is during the totality, when the disk of the sun (the photosphere) is completely covered by the moon.
- The weather will play a huge role in viewing this event: read a forecast and try to be someplace with clear skies. Even with planning, there is a chance it might be obscured by clouds.
- I bought some disposable eclipse glasses, and have looked directly at the sun with them on. They seem to be effective, although I don’t exactly trust them, so I won’t be staring through them at the sun for more than a second or two.
- Though they appear large in the sky compared to stars and planets, the sun and moon actually occupy a very small area of the sky. Filling the frame with these celestial bodies requires either an astronomical telescope or a very long telephoto lens.
- When the disk of the sun is visible, normal exposures are not effective without a neutral density filter, in these cases sometimes sold as a solar filter. These act as powerful “sunglasses,” since the photosphere (the surface of the sun) is much brighter than anything on earth.
- When the sun is eclipsed by the moon, exposure values are hundreds of times darker than before. Camera settings can go from f/16 at 1/1000th of a second to f/4 at one, two, ten seconds or longer depending on conditions. The most interesting thing to photograph during the totality is the solar corona, which is very faint compared to the photosphere.
- Cell phones, point-and-shoot cameras, and cameras with the ever-popular “kit lens” will be unable to fill the frame with anything useful during an eclipse, as we have see time and again during lunar eclipses.
- A rock-solid tripod will be indispensable, particularly during totality when exposures will be long.
- The ultimate solution to this photographic puzzle would be to use a real (and very expensive) astronomical telescope.
- Someone recently told me the best approach of all would be to find a spot, relax, and enjoy the eclipse, then buy a photograph or enjoy all the posts on the web. That’s certainly a valid point of view, but I am a photographer, and feel like I should be shooting this, which I will very much enjoy.
There are maps and other useful information at the Eclipse 2017 web site.