DNG is a raw image format that stores unprocessed camera data so you can edit it later without losing quality

A DNG file (Digital Negative) holds the raw sensor data straight from your camera — the unprocessed information before any sharpening, color correction, or compression happens. Think of it like a digital negative in film photography: it contains all the information your camera captured, and you decide later how to develop it. Most cameras save raw files in their own proprietary format (Canon uses .CR2, Nikon uses .NEF, Sony uses .ARW). DNG is Adobe's open standard that does the same thing, and some cameras can save directly to DNG instead.

The main reason to use DNG is control. When you open a DNG file in editing software, you can adjust exposure, white balance, shadows, and highlights without degrading the image the way you would if you edited a JPEG. A JPEG is already processed and compressed — once you save over it, information is gone. A DNG file lets you make those same adjustments and then save the result as a JPEG or TIFF without ever touching the original data.

The trade-off is file size and workflow. A DNG file from a modern camera is typically 30 to 100 megabytes, depending on the camera's resolution. Your camera will fill up faster, your computer needs more storage, and editing takes longer because the software has more data to process. You also need editing software that understands DNG — not every photo app does.

Key Takeaways

  • DNG files contain unprocessed camera sensor data, so you can adjust exposure, color, and contrast without losing image quality the way you would with a JPEG.
  • Most cameras save raw files in their own format (Canon, Nikon, Sony each have different extensions), but some newer cameras can save directly to DNG instead.
  • DNG files are 30 to 100 megabytes each, so they fill storage faster than JPEGs and require more disk space for backups.
  • You need editing software that reads DNG files — Lightroom, Capture One, and Photoshop all support them, but not every phone app or basic editor does.

When your camera saves DNG instead of its own raw format

Some cameras let you choose DNG as your raw format in the settings menu. Fujifilm cameras have a DNG option. Some mirrorless cameras from other makers do too. If your camera has this option and you turn it on, every photo saves as a .DNG file instead of whatever the camera normally uses.

The advantage is portability: a DNG file works the same way in any software that reads raw files, whereas a Canon .CR2 file might not open in older versions of Lightroom or in some third-party editors. If you think you might switch cameras or software in the future, DNG removes one source of incompatibility.

The disadvantage is that your camera may process DNG files slightly differently than its native format, and some camera-specific features (like lens correction built into the camera's own software) might not work. Check your camera manual to see whether DNG mode is available and what it disables.

Converting your existing raw files to DNG

If your camera saves in Canon, Nikon, Sony, or another proprietary format, you can convert those files to DNG using Adobe's free DNG Converter tool or through Lightroom. Open the file in Lightroom, go to File > Export, and choose DNG as the export format. The original file stays untouched; you get a new DNG copy.

People usually convert to DNG for one of two reasons: they want a backup in a format that will be readable 20 years from now (DNG is an open standard, so it is less likely to become obsolete), or they are moving to new software and want all their files in one format. Converting takes time — if you have thousands of photos, expect to spend an hour or more depending on your computer speed.

You do not have to convert. Your original raw files work fine in Lightroom and Photoshop as they are. Conversion is optional and mainly matters if you are thinking about long-term archiving or switching to software that does not read your camera's native format.

DNG versus JPEG: which one to shoot

Shoot DNG (or your camera's raw format) if you plan to edit the photo significantly, you shoot in difficult lighting, or you want to keep the original data safe. Raw files give you the most flexibility. Shoot JPEG if you want smaller files, faster workflow, or you are shooting something you will not edit much — a quick snapshot for social media, for example.

Many photographers shoot both at once: the camera saves a DNG and a JPEG simultaneously. You get the small JPEG for quick sharing and the DNG for anything that needs real editing. This uses more storage but gives you options. Check your camera menu for "raw + JPEG" mode.

If you are new to editing, start with JPEG. Learn how exposure, color, and contrast work. Once you understand what you want to change in a photo, switch to DNG or your camera's raw format so you have the data to make those changes without losing quality.

Software that reads and edits DNG files

Adobe Lightroom and Photoshop both open DNG files natively. Capture One (a professional editing program) reads DNG. Darktable and RawTherapee (free, open-source editors) support DNG. Most phone apps do not — if you want to edit a DNG on your phone, you usually have to convert it to JPEG or TIFF first.

When you open a DNG file in editing software, you see sliders for exposure, white balance, shadows, highlights, clarity, and saturation. You adjust these without changing the original file. When you save, you choose a new format: JPEG for sharing, TIFF for archiving, or you can save it back as DNG if you want to preserve the edits as a new raw file.

Before you commit to shooting DNG, check that your editing software supports it. If you use a basic editor or a phone app that does not read raw files, DNG will not help you — you will need to convert to JPEG first, which defeats the purpose.

Storage and backup considerations for DNG files

A typical DNG file from a 24-megapixel camera is 50 to 70 megabytes. A 45-megapixel camera produces 100+ megabyte files. If you shoot 100 photos a day, that is 5 to 10 gigabytes of storage per day. Over a year, you are looking at multiple terabytes if you keep everything.

This matters for backups. A single external hard drive is not enough — if it fails, your photos are gone. Most photographers who shoot raw keep at least two copies: one on their computer, one on an external drive, and ideally a third copy on cloud storage or another drive kept somewhere else. This sounds like overkill until your main drive fails.

If storage is tight, convert your edited photos to JPEG and delete the DNG files after you finish editing. Keep the DNG only for photos you might want to re-edit later. This is a common workflow: shoot DNG, edit to JPEG, archive the JPEG, delete the DNG.

DNG and long-term file preservation

DNG was created partly because proprietary raw formats can become unreadable if a camera company stops supporting them or goes out of business. DNG is an open standard maintained by Adobe and documented publicly, so software developers can build readers for it. This makes DNG a safer bet for photos you want to keep for decades.

That said, no format is may provide to be readable forever. Technology changes. The safest approach is to keep multiple copies in multiple formats — a DNG or raw file as your original, a TIFF as a high-quality backup, and a JPEG for everyday use. If one format becomes obsolete, you have others.

If you are archiving photos for the long term, DNG is a reasonable choice. If you are just shooting for fun or work and plan to delete most photos after a year or two, the format matters less.

Frequently Asked Questions

Can I open a DNG file on my phone?

Most phone photo apps do not read DNG files. You can view the image if you convert it to JPEG or TIFF first, but editing a DNG on a phone usually requires a specialized app like Snapseed (which does support some raw formats) or uploading to a cloud service. For serious editing, use a computer.

Is DNG better than my camera's raw format?

Not necessarily. Your camera's native raw format (Canon .CR2, Nikon .NEF) works perfectly fine in Lightroom and Photoshop. DNG is mainly useful if you want a format that is less likely to become obsolete, or if you are switching to software that does not read your camera's format. If your current workflow is fine, you do not need to convert.

Do I lose quality when I convert a raw file to DNG?

No. Converting from your camera's raw format to DNG is lossless — no image data is lost. You end up with a new file that contains the same information as the original, just in a different format. The file size might change slightly depending on how the conversion is done.

What is the difference between DNG and TIFF?

DNG is raw (unprocessed sensor data), while TIFF is processed. A TIFF file has already been color-corrected and compressed by your camera or editing software. DNG gives you more editing flexibility because you are working with the original data. TIFF is better for final archival because it is smaller and more widely supported.

Should I shoot DNG if I am just starting out with photography?

Not necessarily. Start with JPEG to learn how your camera works and what editing looks like. Once you understand exposure and color, switch to raw (your camera's native format or DNG) so you have more data to work with. Raw files are more powerful but also more work — learn the basics first.