Format
Digital Negative Format (DNG)
Summary
- Name
- Digital Negative Format (DNG)
- Version
- 1.1
- Identifiers
-
- PUID: fmt/152
- MIME: image/tiff
- Format type
- Image (Raster)
- 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 format, and is compatible with the TIFF-EP standard. This version was published in February 2005 and corrected the flaws in the first version. It has proved capable of representing raw images for a large variety of cameras (both when written in-camera or via conversion from other raw image formats) for a few years, and it is the version still typically written in-camera.
- Format encoding
- Text
- File extensions
-
dng,tif,tiff - Submitted by
- Digital Preservation Department / The National Archives
Relationships
- Has priority over
- Is previous version of
- Is subsequent version of
- Is subtype of
Internal signatures
DNG 1.1 (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}12C601000400000001010000- Endianness
- Little-endian
DNG 1.1 (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
12C601000400000001010000- Endianness
- Little-endian
DNG 1.1 (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}C61200010000000401010000- Endianness
- Big-endian
DNG 1.1 (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
C61200010000000401010000- Endianness
- Big-endian
Changelog
-
V116
- Release date
- 23 November 2023
-
Updated
Digital Negative Format (DNG) 1.1: Max-offset increased to 128000 bytes for EOF signatures and MIME type of 'image/dng' added. Submitted by Brigham Young University.
-
V105
- Release date
- 29 June 2022
-
Updated
Digital Negative Format (DNG) 1.1: Changed maximum offset in signature to the TIFF header and DNGVersion tag near EOF from 4084 to 10000 bytes. Submitted by Digital Repository, Historic Environment Scotland.
-
V103
- Release date
- 11 March 2022
-
Updated
Digital Negative Format (DNG): Changed maximum offset of 'TIFF header plus DNGVersion tag near EOF' from 4084 to 6000 bytes. Submitted by Digital Repository, Historic Environment Scotland.
-
V82
- Release date
- 27 March 2015
-
Updated
Digital Negative Format (DNG) 1.1: Set priority over Nikon Digital SLR Camera Raw Image File due to potential for clash.
-
V60
- Release date
- 11 June 2012
-
Added signature
DNG 1.1 (little-endian, BOF): Signature developed through PRONOM Research.
DNG 1.1 (little-endian, BOF+EOF): Signature developed through PRONOM Research.
DNG 1.1 (big-endian, BOF): Signature developed through PRONOM Research.
DNG 1.1 (big-endian, BOF+EOF): Signature developed through PRONOM Research.
-
Updated
Digital Negative Format (DNG) 1.1: Description added. Priority information added to avoid potential mis-identification with Tagged Image File Format, Tagged Image File Format for Electronic Photography (TIFF/EP), Exchangeable Image File Format (Uncompressed) 2.0, Exchangeable Image File Format (Uncompressed) 2.1, Exchangeable Image File Format (Uncompressed) 2.2.
External Links
The National Archives is not responsible for the contents available at the following links