E4 - Should you bother with firmware? • Sigma's "dream lens" • How to cure camera shake

In Focus this episode, James and Mike argue the pros and cons of firmware. Is it worth updating your camera, when the rewards are new features and better performance but the risks include bricking your body? We discuss horror stories and best practices.

For our Gear Up section, we get to grips with the "dream lens" of Sigma CEO Kazuto Yamaki: the 300-600mm f/4 Sports lens, which is remarkable not just for its image quality but also its incredible price. But how do James and Mike, as Canon and Nikon shooters respectively, feel about missing...