Terje Sorgjerd used a variety of equipment to create the time-lapse videos, including a Canon 5D Mark II camera, a Canon 550D camera, and several lenses. He also used a motorized dolly and a tripod to capture the smooth and steady movement in his shots.
The time-lapse videos were filmed over the course of several nights, with each night lasting between 6 to 12 hours. In total, it took Terje Sorgjerd approximately 10 days to capture all the footage for the videos.
To capture the movement of the stars and auroras, Terje Sorgjerd used a technique called "tilt-shift" photography. This involves using a special lens that can tilt and shift to create a shallow depth of field and a sense of motion in the shots. He also used long exposure times and multiple shots to create the smooth and fluid movement seen in the videos.
Terje Sorgjerd carefully selected locations that were known for having clear skies and minimal light pollution, such as the mountains of Norway and the deserts of Spain. He also researched the best times of year to capture the auroras and planned his trips accordingly.
According to Terje Sorgjerd, the most challenging part of creating these time-lapse videos was the unpredictable weather conditions. He had to be patient and wait for clear skies and good conditions, which sometimes meant waiting for several days or even weeks. He also had to deal with technical challenges, such as keeping his equipment safe in extreme temperatures and windy conditions.