Camera RAW: Digital Negatives & DNG Standards
Bayer sensor data, uncompressed dynamic range, and digital negatives.
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Format Comparison & Technical Specifications
| Output Format | MIME Type | Specification | Type |
|---|---|---|---|
| ARW Sony | image/x-sony-arw | SONY-ARW-SPEC | Sony Alpha Camera RAW |
| SRF Sony | image/x-sony-srf | SONY-ARW-SPEC | Sony Cyber-shot Camera RAW |
| SR2 Sony | image/x-sony-sr2 | SONY-ARW-SPEC | Sony Digital Camera RAW Version 2 |
| SONY RAW Family | image/x-sony-arw | SONY-ARW-SPEC | Sony Alpha & Cyber-shot RAW Family |
| NEF Nikon | image/x-nikon-nef | NIKON-NEF-SPEC | Nikon Electronic Format RAW |
| NRW Nikon | image/x-nikon-nrw | NIKON-NEF-SPEC | Nikon Coolpix Camera RAW |
| NIKON RAW Family | image/x-nikon-nef | NIKON-NEF-SPEC | Nikon Mirrorless & DSLR RAW Family |
| CRW Canon | image/x-canon-crw | CANON-CRW-SPEC | Canon Digital Camera RAW Version 1 |
| CR2 Canon | image/x-canon-cr2 | CANON-CR2-SPEC | Canon EOS RAW Version 2 |
| CR3 Canon | image/x-canon-cr3 | CANON-CR3-SPEC | Canon EOS RAW Version 3 (ISOBMFF) |
| CANON RAW Family | image/x-canon-cr2 | CANON-CR2-SPEC | Canon EOS & PowerShot RAW Family |
| RW2 Panasonic | image/x-panasonic-rw2 | PANASONIC-RW2-SPEC | Panasonic Lumix Camera RAW |
| LUMIX Panasonic RAW Family | image/x-panasonic-rw2 | PANASONIC-RW2-SPEC | Panasonic Lumix Camera RAW Family |
| ORF Olympus | image/x-olympus-orf | OLYMPUS-ORF-SPEC | Olympus & OM System Camera RAW |
| RAF Fujifilm | image/x-fuji-raf | FUJIFILM-RAF-SPEC | Fujifilm X-Trans Camera RAW |
| PEF Pentax | image/x-pentax-pef | PENTAX-PEF-SPEC | Pentax Electronic File RAW |
| PTX Pentax | image/x-pentax-ptx | PENTAX-PEF-SPEC | Pentax Digital Camera RAW |
| PENTAX RAW Family | image/x-pentax-pef | PENTAX-PEF-SPEC | Pentax DSLR & Medium Format RAW Family |
| X3F Sigma | image/x-sigma-x3f | SIGMA-X3F-SPEC | Sigma Foveon X3 Direct Sensor RAW |
| SIGMA RAW Family | image/x-sigma-x3f | SIGMA-X3F-SPEC | Sigma Foveon Direct Sensor Family |
| SRW Samsung | image/x-samsung-srw | SAMSUNG-SRW-SPEC | Samsung NX Mirrorless RAW |
| SAMSUNG RAW Family | image/x-samsung-srw | SAMSUNG-SRW-SPEC | Samsung NX Mirrorless RAW Family |
| RWL Leica | image/x-leica-rwl | LEICA-RAW-SPEC | Leica Camera RAW Format |
| LEICA RAW Family | image/x-leica-rwl | LEICA-RAW-SPEC | Leica M, SL, Q & D-Lux RAW Family |
| KDC Kodak | image/x-kodak-kdc | KODAK-RAW-SPEC | Kodak EasyShare Camera RAW |
| DCR Kodak | image/x-kodak-dcr | KODAK-RAW-SPEC | Kodak Professional DCS RAW |
| K25 Kodak | image/x-kodak-k25 | KODAK-RAW-SPEC | Kodak DC25 Digital Camera RAW |
| DCS Kodak | image/x-kodak-dcs | KODAK-RAW-SPEC | Kodak Digital Camera System RAW |
| DRF Kodak | image/x-kodak-drf | KODAK-RAW-SPEC | Kodak Pro SLR Camera RAW |
| KODAK RAW Family | image/x-kodak-kdc | KODAK-RAW-SPEC | Kodak Professional & Consumer RAW Family |
| DNG Adobe | image/x-adobe-dng | ADOBE-DNG-SPEC | Digital Negative RAW Format |
| RAW Camera | image/x-camera-raw | LIBRAW-SPEC | Generic Camera RAW Sensor File |
| JPG Processed JPEG | image/jpeg | ITU-T-T81-JPEG | Standard Export JPEG |
| PNG Processed | image/png | W3C-PNG | Lossless Export PNG |
Technical Specifications & Codec Breakdown
Why Camera RAW is Not an Image Yet
A RAW file is not a viewable image: it is raw sensor voltage measurements captured behind a Bayer color filter. Software must 'develop' (demosaic) the raw data, letting photographers adjust exposure and white balance after shooting with zero quality loss.
Adobe DNG: Protecting RAW Photos From Obsolescence
Camera manufacturers invent new proprietary RAW extensions (CR3, NEF, ARW) with every camera model. Adobe DNG (Digital Negative) is an open standard that preserves full raw sensor data, guaranteeing photos remain readable decades into the future.
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