In March, i got the chance to shoot some aurora borealis in norway. Lucky 3/6 nights. One night, i wanted to get some balance between stars and aurora in the sky, but the aurora was too strong (luxury problems, i know.) in the first place. So i decided to freeze and wait for less activity... totally worth it, imo.
Coming from Canon-Fullframe-Land after many years, i thought i knew, what good high ISO performance was. Insert gameshow fail sound here. Boy, was i wrong! The high ISO capabilities of the A7R2 blew me away as i shot an exposure of 30 seconds at ISO 5.000. Of course, there's some noise, but WAY less than i expected from a 42MP picture. And quite easy to remove, too.