A RAW image file stores data captured by a camera’s image sensor, along with capture information, so compatible software can interpret and render it later. Unlike a JPEG, it is not already a finished color image processed by the camera. RAW is a family of formats—not one universal file type—and the right way to open or convert a file depends on the camera that created it.
What does RAW mean in photography?
RAW refers to image data recorded from a camera sensor before the camera renders it into a finished image. Adobe describes camera RAW as unprocessed sensor data that software interprets to construct a color image. The file also carries information about the capture.
A useful analogy is a digital negative: a RAW file leaves more decisions about the image’s rendering for later, but it is not a finished picture that every application can display as-is. Software must interpret the data to produce a viewable image. Adobe explains the distinction in its Camera Raw documentation.
How is RAW different from JPEG?
A camera processes a JPEG before saving it, applying image enhancements and compression. A RAW file keeps sensor data for later interpretation, which gives you more choice over processing decisions in compatible software. That extra latitude is useful when you want to adjust the image after capture; it does not mean every RAW format or adjustment works the same way.
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| Aspect | RAW | JPEG |
|---|---|---|
| What is stored | Sensor image data and capture information for later interpretation | A camera-processed image with enhancements and compression |
| Later processing | More latitude to choose how compatible software renders the image | The camera has already rendered and compressed the image |
| Opening | Requires software that supports the specific camera format | Generally delivered as a rendered image; the researched Adobe documentation does not specify universal JPEG compatibility |
| File size | Varies; no universal RAW-to-JPEG size ratio is established | Varies; no universal RAW-to-JPEG size ratio is established |
Neither format is automatically the right choice for every situation. RAW suits a workflow that values later processing flexibility and can accommodate format-specific software. JPEG is convenient when you want the camera’s rendered image ready to use. The cited documentation does not establish a universal winner for image quality or a consistent size ratio.
Is RAW one standard format?
No. Camera makers use formats that can be specific to their cameras. Nikon’s NEF, for example, is exclusive to Nikon cameras; it is one manufacturer’s RAW format, not another name for all RAW files. Nikon says NEF is stored uncompressed or losslessly compressed and retains processing instructions—such as white balance, hue, tone, and sharpening—rather than applying those adjustments to the stored RAW data. NEF bit depth depends on the camera, so Nikon’s examples should not be generalized to every RAW format. See Nikon’s NEF explanation.
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- Use the EOS Utility Webcam Beta Software (Mac and Windows) to turn your compatible Canon camera into a high-quality webcam
How do you open a RAW image file?
Use an application that supports the format from your camera model. A program may handle one camera’s RAW files without supporting a newer or different model, so check the software’s compatibility information for your exact camera and software version.
- Identify the camera and file format. Check the file extension and the camera model that captured it; a format such as NEF points to a manufacturer-specific RAW file.
- Check application support for that camera. Adobe lists Camera Raw, Photoshop, Lightroom, and Lightroom Classic among applications supporting DNG, and its Camera Raw supported-camera list can help you check a specific model.
- Open the file in a compatible application. If the application does not recognize it, check whether your camera model requires a newer version or whether a supported conversion route is available.
Opening a RAW file involves rendering it for viewing. Adjustments may be stored separately in a sidecar file or database, or inside a DNG file, depending on the software and format. Adobe documents these options for its Camera Raw workflow; Nikon says NEF processing instructions can change while the original RAW data is preserved. Do not assume that every editor stores edits in the same way.
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Should you convert RAW to DNG?
DNG is Adobe’s openly published format for camera RAW data. Converting a camera-specific RAW file to DNG may help with software interoperability and long-term access because the format specification is public. It is an option, not a guarantee that every future application will open every file.
There is a metadata tradeoff: Adobe cautions that DNG Converter may omit some proprietary metadata. If retaining that information matters, Adobe offers the option to embed the original RAW file in the DNG. Adobe provides a free DNG Converter for supported camera-specific RAW files.
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- 24.1 Megapixel CMOS (APS-C) sensor with is 100–6400 (H: 12800)
- Built-in Wi-Fi and NFC technology
- 9-Point AF system and AI Servo AF
- Optical Viewfinder with approx 95% viewing coverage
- Use the EOS Utility Webcam Beta Software (Mac and Windows) to turn your compatible Canon camera into a high-quality webcam. Compatible Lenses- Canon EF Lenses (including EF-S lenses, excluding EF-M lenses)
- Consider DNG if its format and your software fit your workflow and you value a publicly documented option.
- Keep the original RAW or embed it if preserving proprietary information is important to you.
- Check compatibility first because conversion does not guarantee universal support in future software.
What to know before choosing RAW
- You need compatible software to interpret and render the particular camera format.
- RAW offers more scope for later processing, but it is not a finished image and does not make every format or editing workflow interchangeable.
- Storage and card requirements depend on the camera and its settings; the cited manufacturer information does not establish one memory-card recommendation for all cameras.
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