DNG to PDF
Share a DNG negative as a one-page PDF for review or a report. LibRaw develops it to 8-bit sRGB, so retain DNG for raw edits and source data.
Format Comparison & Technical Specifications
| Specification | DNG | |
|---|---|---|
| MIME Type | image/x-adobe-dng | application/pdf |
| Type | universal camera RAW | document container |
| Compression | lossless JPEG / uncompressed Bayer mosaic | Flate / JPEG / JBIG2 / CCITT |
| Standard Specification | Adobe DNG 1.6.0.0 Specification | ISO 32000-2:2020 |
| Magic Bytes Header | 49 49 2A 00 (TIFF header with DNGPrivateData tags) | 25 50 44 46 (%PDF) |
Format Overview & Applications
A drone or phone DNG can be shared as a review document, but the original is the one to reopen when someone asks for a different crop or tone.
Technical Specifications & Codec Breakdown
The input is first checked for a TIFF signature and DNGVersion tag, then LibRaw applies camera white balance, camera matrix and AHD demosaicing to make upright 8-bit sRGB pixels.
OS & Browser Compatibility
Adobe Camera Raw, Lightroom, and other DNG-aware editors can work with the negative; a PDF reader can review its developed image without DNG support.
Useful info
Apply the intended crop and tone treatment in a DNG editor before conversion if those choices matter; the page contains developed pixels, not DNG controls.
Format Comparison & Technical Specifications
A 6048×4032 DNG review image maps to a 40.3×26.9 inch page at 150 dpi.
Frequently Asked Questions
Does DNG validation mean every DNG feature is retained?
The DNGVersion tag is checked before LibRaw decodes the image, but the PDF contains only its 8-bit sRGB render.
Why might a TIFF renamed to DNG be rejected?
The precheck requires a TIFF directory with the DNGVersion tag; an ordinary TIFF does not meet that container check.
Can I adjust the DNG crop from the PDF?
No; set the crop in a DNG editor and create another page if reviewers need a revised framing.