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Image Format

DNG

Digital Negative

DNG (Digital Negative) is Adobe's open standard for RAW camera files. Unlike proprietary RAW formats (CR2, NEF, ARW), DNG is publicly documented and not owned by any single manufacturer. It's used natively by Leica, Hasselblad, Ricoh, and other cameras, and Adobe's tools can convert any proprietary RAW to DNG. The goal: a universal RAW format that will remain readable far into the future.

What is DNG?

DNG was created by Adobe in 2004 to address the fragmentation of proprietary RAW formats. Every camera manufacturer had their own RAW format (Canon: CR2/CR3, Nikon: NEF, Sony: ARW, Fujifilm: RAF, Olympus: ORF) — all incompatible, all dependent on the manufacturer continuing to update software to support them. Adobe proposed DNG as a universal open-standard RAW format that any software could implement without licensing fees, and that would have publicly documented specifications for long-term archival integrity. DNG is structurally based on TIFF (Tagged Image File Format) and contains the same type of sensor data as proprietary RAW formats: unprocessed (or minimally processed) image data from the camera sensor, camera settings as metadata, and color matrices for accurate color rendering. DNG also supports embedding the original proprietary RAW file inside the DNG container — useful for archival purposes when you want both the open-standard version and the manufacturer's original. Software support: every major RAW processor supports DNG — Adobe Lightroom, Camera Raw, Capture One, RawTherapee, darktable. Camera support: Leica M-series, Q-series, SL-series, and others shoot DNG natively. Adobe provides a free DNG Converter application for converting proprietary RAW files to DNG.

DNG pros and cons

Advantages

  • Open standard — publicly documented, no licensing fees for software developers
  • Future-proof — less dependent on camera manufacturer's continued software support
  • Universal support across all major RAW processing software
  • Supported natively by Leica, Hasselblad, Ricoh, and other cameras
  • Smaller than some proprietary RAW formats (better lossless compression option)
  • Can embed the original proprietary RAW as a safety net

Limitations

  • Converting from proprietary RAW to DNG adds a processing step
  • Some Lightroom-specific metadata doesn't convert to other apps even via DNG
  • Not all camera-specific features are preserved in DNG conversion
  • Conversion from proprietary RAW to DNG takes additional storage and time
  • Not the native format for most cameras — requires post-capture conversion

When should you convert DNG files?

Convert proprietary RAW (CR2, NEF, ARW) to DNG for long-term archival storage — DNG ensures your files will be readable by software decades from now, even if Canon, Nikon, or Sony stop updating their RAW support. Convert to DNG if you use Adobe Lightroom exclusively and want smaller file sizes (Lightroom's DNG export with lossy DNG option). Do NOT convert to DNG if you use camera-specific software that provides unique processing capabilities for your manufacturer's proprietary RAW. Keep original RAW if you embed it in the DNG — that way you have both formats.

Convert DNG files

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DNG FAQ

Should I convert my RAW files to DNG?
It's a legitimate archival choice but not necessary for day-to-day workflow. The main argument for DNG: future-proofing — proprietary formats depend on software vendors maintaining support. DNG's open spec means any software developer can implement support. The argument against: conversion takes time and storage, and some camera-specific metadata and features may not transfer perfectly. Recommendation: keep original RAWs, and optionally create DNG copies for long-term archive.
Does DNG lose quality compared to the original RAW?
Standard DNG conversion (non-lossy): no quality loss. The sensor data is identical to the original RAW, just in a different container format. Adobe also offers 'Lossy DNG' as an option, which does apply compression similar to JPEG — this reduces file size significantly but does introduce some quality loss. For archival: use lossless DNG. For a smaller working copy: lossy DNG at high quality is acceptable.
Which cameras shoot DNG natively?
Leica: M-series (M11, M10, M9, M8), Q-series (Q3, Q2, Q), SL-series. Hasselblad: most medium-format digital cameras. Ricoh GR series. Sigma (some models). Micro Four Thirds cameras from Pentax. Most Android phones with pro camera modes (Google Pixel, Samsung Galaxy S-series, etc.) can save DNG from their camera app.

More formats

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