Sabaton Live at Piraeus 112 Academy - Athens, Greece - 08 March 2017
ISO 125 | 1/320 s | f/2.5
The exposure now is been determined by your aperture, shutter speed and the "film speed" as we used to called it is almost irrelevant cause you can simple gain in post.
Aperture: f/2.5 - Could be possible to open up f/2 with a 25mm lens, but wanted to get the most details at the center of the frame, while having a more structured background and keeping that nice separation.
Shutter Speed: 1/320s - Plenty of light to go faster, but a little of blur adds to the movement of the hair, as it gives a sense of motion.