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Format

Digital Negative Format (DNG)

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Summary

Name
Digital Negative Format (DNG)
Version
1.2
Identifiers
  • PUID: fmt/437
  • MIME: image/dng
Format type
Image (Raster)
Disclosure
Full
Description
The Digital Negative (DNG) Specification describes a non-proprietary file format for storing camera raw files that can be used by a wide range of hardware and software vendors. DNG is an extension of the TIFF 6.0 format, and is compatible with the TIFF-EP standard. This version, published May 2008, was based on experience and feedback from other companies about DNG since its launch. It introduced many new features, especially several new options for colour specification under the general heading of "Camera Profiles". These are mainly of value to software products wanting their own flavour of colour handling. This version permits administrative control of Camera Profiles, including calibration signatures and copyright information.
File extensions
dng
Submitted by
Adobe Systems Incorporated

Relationships

Has priority over
Is previous version of
Is subsequent version of
Is subtype of

Internal signatures

DNG 1.2 (little-endian, BOF)

Description
TIFF header plus DNGVersion tag near BOF
Provenance
Digital Negative (DNG) Specification Version 1.3.0.0 http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/products/photoshop/pdfs/dng_spec.pdf

Byte sequences

Min Frag Length
Absolute from BOF
Offset
0
Max offset
0
Byte Sequence
49492A00{0-4080}12C601000400000001020000
Endianness
Little-endian

DNG 1.2 (little-endian, BOF+EOF)

Description
TIFF header plus DNGVersion tag near EOF
Provenance
Digital Negative (DNG) Specification Version 1.3.0.0 http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/products/photoshop/pdfs/dng_spec.pdf; 11/2023 (v.116)- EOF max-offset increased to 128000. Submitted by Brigham Young University.

Byte sequences

Min Frag Length
Absolute from BOF
Offset
0
Max offset
0
Byte Sequence
49492A00
Endianness
Little-endian
Min Frag Length
Absolute from EOF
Offset
0
Max offset
128000
Byte Sequence
12C601000400000001020000
Endianness
Little-endian

DNG 1.2 (big-endian, BOF)

Description
TIFF header plus DNGVersion tag near BOF
Provenance
Digital Negative (DNG) Specification Version 1.3.0.0 http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/products/photoshop/pdfs/dng_spec.pdf

Byte sequences

Min Frag Length
Absolute from BOF
Offset
0
Max offset
0
Byte Sequence
4D4D002A{0-4080}C61200010000000401020000
Endianness
Big-endian

DNG 1.2 (big-endian, BOF+EOF)

Description
TIFF header plus DNGVersion tag near EOF
Provenance
Digital Negative (DNG) Specification Version 1.3.0.0 http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/products/photoshop/pdfs/dng_spec.pdf; 11/2023 (v.116)- EOF max-offset increased to 128000. Submitted by Brigham Young University.

Byte sequences

Min Frag Length
Absolute from BOF
Offset
0
Max offset
0
Byte Sequence
4D4D002A
Endianness
Big-endian
Min Frag Length
Absolute from EOF
Offset
0
Max offset
128000
Byte Sequence
C61200010000000401020000
Endianness
Big-endian

Changelog

  • V116

    Release date
    23 November 2023

    • Updated

      Digital Negative Format (DNG) 1.2: Max-offset increased to 128000 bytes for EOF signatures and MIME type of 'image/dng' added. Submitted by Brigham Young University.

  • V82

    Release date
    27 March 2015

    • Updated

      Digital Negative Format (DNG) 1.2: Set priority over Nikon Digital SLR Camera Raw Image File due to potential for clash.

  • V66

    Release date
    18 December 2012

    • Updated

      Digital Negative Format (DNG) 1.2: Corrected priority information to avoid multiple identification clashes with TIFF identified by Ross Spencer.

  • V60

    Release date
    11 June 2012

    • Added format

      Digital Negative Format (DNG) 1.2: Full entry added.

    • Added signature

      DNG 1.2 (little-endian, BOF): Signature developed through PRONOM Research.

      DNG 1.2 (little-endian, BOF+EOF): Signature developed through PRONOM Research.

      DNG 1.2 (big-endian, BOF): Signature developed through PRONOM Research.

      DNG 1.2 (big-endian, BOF+EOF): Signature developed through PRONOM Research.