X3F is a raw image file format used by Sigma digital cameras. It stores unprocessed image data directly from the camera's sensor, offering the highest quality and flexibility for post-processing. X3F files are large but provide photographers with the ability to make detailed adjustments in editing software.
GIF is a graphics format that supports both static and animated images. It uses lossless compression, preserving the image quality while keeping file sizes small. GIFs are popular on social media and in web design for creating simple animations or small visual elements. However, they are limited to 256 colors.