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RAW

A RAW image is the least-processed image type on this list -- it's often the first format a picture inherits when it's created. When you snap a photo with your camera, it's saved immediately in a raw file format. Only when you upload your media to a new device and edit it using image software is it saved using one of the image extensions explained above. RAW images are valuable because they capture every element of a photo without processing and losing small visual details. Eventually, however, you'll want to package them into a raster or vector file type so they can be transferred and resized for various purposes.

DNG

Digital Negative (DNG) is a raw image file format for digital photography that's open-source, royalty-free, and highly compatible. It was developed by Adobe to address the lack of an open standard for raw files from different cameras and editing software. DNG files are supported by many software manufacturers, including Apple and Google, and camera manufacturers, including Leica, Casio, Ricoh, Samsung, and Pentax. Editing: DNG files are easier to edit because changes are written directly into the file. Non-destructive editing allows you to revert to the original image data at any time. Size: DNG files are typically 15–20% smaller than RAW files. Storage: DNG files can be compressed, making them ideal for storage and archives. Future compatibility: DNG files are more likely to be openable in the future. DNG files can also be used to store metadata, such as shooting parameters, copyright, and star ratings.