Why is the term RAW image file used to describe various file formats?

The term RAW image file refers to file formats that contain unprocessed data directly from a camera's sensor, retaining the maximum amount of information and detail captured during shooting. The correct answer relates to the proprietary nature of many RAW formats. Each camera manufacturer often creates its own unique RAW file format, which may include specific features and methods of data storage. This means that RAW files can differ significantly between brands and even between models from the same brand.

Because RAW files are proprietary, they require specialized software or plugins to open and edit, which may not be universally accessible. This uniqueness is a key factor that distinguishes RAW files from other file formats, such as JPEG or TIFF, which are standardized and widely supported across different devices and software.

While RAW files are indeed uncompressed and editable, these characteristics are not the defining reasons behind the widespread use of the term "RAW" compared to its proprietary nature. The focus on proprietary file formats explains why it’s essential for photographers to be aware of the specific RAW file type their camera produces and the implications for storage, editing, and compatibility with different software.