DNG
From Just Solve the File Format Problem
DNG (Digital Negative) is a digital camera raw image format developed by Adobe and released in 2004. Adobe also released a free DNG converter at this time which is continually being updated with compatible RAW file types. DNG is an extension of TIFF 6.0 and is compatible with TIFF/EP.
Adobe intends for DNG to become an archival file type, creating an open standard for RAW files.
Metadata can be written directly into a DNG file.
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Disambiguation
The term digital negative is also used generically, to mean any raw image from a digital camera.
Identification
TIFF tag 50706 ("DNGVersion") is present. However, some files containing this tag would be better identified as a specific raw camera format.
Specifications
Although the DNG specification is freely available, it makes frequent reference to the TIFF/EP specification, which is not, although does follow some TIFF/EP specs like SubIFD trees.
- Digital Negative Specification, Version 1.6.0.0 (2021-12) fmt/1842
- Digital Negative Specification, Version 1.5.0.0 (2019-05; from archive.org) fmt/1841
- Digital Negative Specification, Version 1.4.0.0 (2012-06; from archive.org) fmt/730
- Digital Negative Specification, Version 1.3.0.0 (2009-06; from archive.org) fmt/438
- Digital Negative Specification, Version 1.2.0.0 (2008-04; from archive.org) fmt/437
- Digital Negative Specification, Version 1.1.0.0 (2005-02; from archive.org) fmt/152
- Digital Negative Specification, Version 1.0.0.0 (2004-09; from archive.org) fmt/436
Software
Refer to Cameras and Digital Image Sensors#Software.
Sample files
- http://allaboutwindowsphone.com/features/item/18984_Nokia_Lumia_1020_RAW_camera_ca.php
- http://conversations.nokia.com/2013/10/29/another-nokia-first-digital-negatives-raw-dng-lumia/
- http://www.slack.co.uk/slack/Download.html
- http://www.kenrockwell.com/leica/m9/sample-photos-3.htm
