Star Trails Looking North. Autumn Night Sky. Composite of 143 images taken with a Nikon D3 camera and 16 mm f/2.8 fisheye lens (ISO 200, 16 mm, f/4, 120 sec). Raw images processed with Capture One Pro and the composite done using Photoshop CC (scripts, statistics, maximum). The red/orange background colors are from some clouds that passed over reflecting lights from the ground.