While I was out in Yellowstone a few months back I was determined to shoot some geysers at night under the stars.
While I made made plans to do this all by my lonesome, I actually ran into a friend earlier in the day and he had mentioned he was planning to do some night geyser shooting, too. He even mentioned the same geyser I wanted to go to, White Dome Geyser. So later that night we met up at the geyser.
Now, shooting these starry scenes, or even the Milky Way isn't rocket science. You have to set your camera to Manual Mode. Start by selecting your aperture as wide open as you can get. If your lens goes to F/4, choose that...if it goes to F/2.8, then choose that aperture. Next set your shutter speed to 30 Seconds. Lastly you have to adjust your ISO. I usually start at around 1600 and adjust. If the image needs to be brighter bump your ISO up. If it's too bright, simply lower your ISO. That's it!
I'll admit, though in this image I was using my Sony A7S. It can shoot in the dark without much noise, so it's kinda like cheating. I shoot this at ISO 5000, which is still "low" for this camera.
I processed this image using Lightroom. The new Dehaze Tool in Lightroom really made the sky pop on this image.
I mentioned I shot this with my Sony A7S, but I also used my Tamron Lenses 24-70 F/2.8 Lens. The Milky Way was actually visible above the geyser, but I didn't have a wide enough lens to capture it all. So I settled for the stars and glowing colors of the north.