Aurora Hunting GEOMAGNETIC ENCOUNTER Wyoming isn't typically known for auroral displays. But the author was able to catch the red curtains of an aurora peeking out around Devil's Tower National Monument due to an alert sent from the SpaceWeatherLive app. FOCUS STACK Single-shot aurora photos work well if your foreground lies at a great distance. You can improve the depth of field by using a technique known as focus stacking, in which two images are taken back to back - one at infinity focus for the sky, the other with the focus point set to nearby objects. The two images are then combined with software, such as Adobe Lightroom or Photoshop. This image taken from Apostle Islands National Lakeshore in Wisconsin blends two exposures recorded with a modified Nikon Z6 camera and a Nikkor 20mm f/1.8S lens. The aurora image was exposed for 4 seconds at f/2.2 and ISO 2000, while the foreground uses an exposure of 3 minutes at ISO 4000 and with the lens stopped to f/5. 32 MAY 2024 * SKY & TELESCOPE