UK Author David Taylor gives an authoritative guide to using this versatile camera. It includes hints and tips to help you get the best from its many functions. A pull-out reference card gives quick access to the camera's functions. The Sony A77 is a new interchangeable lens camera that uses Translucent Mirror Technology to offer high-speed shooting: the mirror splits the optical pathway between the main image sensor and a separate phase-detection autofocus sensor, allowing a simplified design that enables the camera to be physically smaller.