What will DX coded film set automatically on a compatible camera?

The DX coding system on film was designed to facilitate the automatic adjustment of film parameters in compatible cameras. When a DX-coded film is loaded into a compatible camera, it is the film speed (ISO) that the camera will automatically set into its light meter. This means that the camera can read the DX code, which contains information about the film's sensitivity to light, and adjust its exposure settings accordingly. This capability allows photographers to use different types of film without needing to manually set the ISO each time, ensuring optimal exposure is achieved based on the film's characteristics.

Understanding the function of DX coding helps clarify its purpose and importance in the film photography process, particularly in automating exposure settings for different film types.