Capturing startrails over a highly light polluted area. Can it be done or not? I always wanted to get some startrails over the Rotterdam skyline. Earlier this year I was shooting this skyline and had a clear sky.
A few stars were visible and I setup my Nikon D750 to frame the skyline and the sky. For the skyline I shot two exposures. One underexposed for the highlights and one overexposed for the shadows. These two would be combined to get the skyline image.
After taking the two skyline shots, I prepared the camera to capture the stars overhead. I had to change the aperture to 2.8 and increase the ISO to 6000 and took some test shots to get the correct exposure time. Now it was time to set the intervalometer on the camera to get 100 shots for the startrails.
I used Starstax to combine the 100 shots to get the startrail photo you see on the right.
Both photos were combined in Photoshop by using blend modes to get the final image you see above.