ISO is one of the three core camera settings – and one of the most misunderstood. In this free course I break down exactly what ISO does, when to push it high and when to keep it low, and why getting it wrong kills your photos. Using real examples from my own shoots I show you the difference between ISO 100 and ISO 6400 – and what that means for your portraits, product shots and everyday photography. Perfect for beginners. Let's get into it.