Difference between revisions of "Nikon Electronic Format"
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| − | [[Main Page]] > [[Documentation]] > [[Format-specific preservation | + | [[Main Page]] > [[Documentation]] > [[Format-specific preservation plans]] > Nikon Electronic Format |
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===File extension(s)=== | ===File extension(s)=== | ||
| − | .nef | + | *.nef |
===Format registry information=== | ===Format registry information=== | ||
| − | [http://www.nationalarchives.gov.uk/PRONOM/Format/proFormatSearch.aspx?status=detailReport&id=927 PRONOM] | + | *[http://www.nationalarchives.gov.uk/PRONOM/Format/proFormatSearch.aspx?status=detailReport&id=927 PRONOM] |
| − | ===Significant | + | ===Significant properties=== |
===Preservation action plan=== | ===Preservation action plan=== | ||
| − | |||
| − | |||
===Preservation issues=== | ===Preservation issues=== | ||
| − | |||
*NEF is a proprietary format with an unpublished specification. | *NEF is a proprietary format with an unpublished specification. | ||
*NEF files can be very large - 70 MB or more. | *NEF files can be very large - 70 MB or more. | ||
| + | *Xena incorrectly guesses the file type as TIFF and normalizes as it would a TIFF, with the result that a very large file (e.g. 70 MB) is normalized to a very small one (eg. 250 KB) with considerable loss of data. Changes to the raw file (ie: alterations done in image editing software) are stored in a separate XMP file, which Xena also does not recognize, and does not normalize together. This means that any edits added by the creator are removed. | ||
| + | *Possible preservation plan is normalization to Adobe Digital Negative (DNG) format | ||
| + | **Library of Congress states that [http://www.digitalpreservation.gov/formats/fdd/fdd000188.shtml Adobe Digital Negative (DNG), Version 1.1] may be emerging as a standard preservation format for raw camera images. Adobe provides a free (but not open-source) [http://www.adobe.com/products/dng/ Adobe DNG Converter] designed for downloading to Windows or Mac computers. | ||
| + | |||
| + | ===Conversion test results=== | ||
| + | |||
| + | ===Access format=== | ||
===More information=== | ===More information=== | ||
Revision as of 14:39, 19 January 2010
Main Page > Documentation > Format-specific preservation plans > Nikon Electronic Format
Also known as
- NEF
- Nikon Image Format
- Nikon Digital SLR Camera Raw Image File
File extension(s)
- .nef
Format registry information
Significant properties
Preservation action plan
Preservation issues
- NEF is a proprietary format with an unpublished specification.
- NEF files can be very large - 70 MB or more.
- Xena incorrectly guesses the file type as TIFF and normalizes as it would a TIFF, with the result that a very large file (e.g. 70 MB) is normalized to a very small one (eg. 250 KB) with considerable loss of data. Changes to the raw file (ie: alterations done in image editing software) are stored in a separate XMP file, which Xena also does not recognize, and does not normalize together. This means that any edits added by the creator are removed.
- Possible preservation plan is normalization to Adobe Digital Negative (DNG) format
- Library of Congress states that Adobe Digital Negative (DNG), Version 1.1 may be emerging as a standard preservation format for raw camera images. Adobe provides a free (but not open-source) Adobe DNG Converter designed for downloading to Windows or Mac computers.
Conversion test results
Access format
More information
- NEF is a raw (i.e. pre-processed) image format produced by Nikon cameras.
- Information on NEF files is available at Library of Congress Sustainability of Digital Formats: Camera Raw Formats.