Tips from the professional photographer on our cruise about how to photograph the aurora
1. Use a very high ISO
2. Use maximum aperture
3. Don't use too long an exposure. My shot was 1 second. The aurora is a moving entity and if you use a very long exposure, while you might capture more light you lose all the shape.
4. Of course you need some way of stabilising your camera. If using a monopod on a ship, stand it on your foot to reduce the vibration. I stabilised my camera on the ship's rail but used a folded towel to dampen the vibration. I tried it with and without the towel and it did make a difference.
You see far more colour in photos than you can with the naked eye. With the naked eye, the aurora was very pale green, almost white.