Why Everything You Know About ISO is Wrong (For Astrophotography)

Think high ISO ruins your photos? In the world of astrophotography, the opposite is often true. Using a series of test shots from my Canon 5D Mark IV, I reveal why shooting at ISO 6400 actually produces a cleaner image than ISO 100. We’re diving deep into 'read noise,' sensor temperature, and why you need to stop being afraid of 'turning up the volume' on your night sky.