The Northern Lights exhibiting the classic green and red tints from oxygen, looking north and northeast to the Big Dpper, over land with a fishing village at left. Taken from the Hurigruten ship the m/s Nordlys north of Tromsø on October 24, 2017. This is a single 2-second exposure with the Sigma 14mm Art lens at f/1.8 and Nikon D750 at ISO 6400.
A decent aurora across the north from home in southern Alberta, on Friday the 13th, October, 2017, though these frames were taken after midnight MDT. They are part of a 1000-frame time-lapse. Each frame is 3 seconds at f/2 and ISO 6400 wth the Sigma 14mm lens and Nikon D750. They show the main auroral oval topped by oxygen reds and spires and spikes that moved slowly westward. Diffuse green patches above turned off and on, and these may be from glowing N atoms and O2+ molecules rather than the usual O atoms.
