TIFF is uncompressed. Since TIFF does not use any compression algorithms like JPEG or GIF formats, the file contains more data and results in a more detailed picture. However, because TIFF files contain more data, the files are large and take up a lot of storage space. Thus, the number of images that can be taken and saved on recording media is limited.
RAW also is uncompressed, but is like the digital equivalent of a film negative. Unlike TIFF, a RAW file first needs to be processed or developed using Image Data Converter or other compatible software. The benefit of this format is that you can adjust various attributes such as contrast, saturation, sharpness, white balance, and others without degrading the image. Afterwards, it can be saved to another image format like TIFF or JPEG.