Informazioni sui file DNG

DNG (Digital Negative (RAW) · Formato immagine)

Rilasciato 2004 Di Adobe Systems

Digital Negative (RAW) (.dng) è un formato di file standard supportato da KaijuConverter per l’archiviazione, la condivisione e la conversione multipiattaforma.

Famiglia

Raster & Vector Images

Estensione

.dng

Tipo MIME

image/x-adobe-dng

Utilizzabile come

Input

La storia

COME DNG
È NATO.

DNG — Digital Negative — was Adobe’s attempt in 2004 to rescue photography from vendor lock-in. Every camera manufacturer was shipping its own proprietary raw format (Canon’s CR2, Nikon’s NEF, Sony’s ARW…) and Adobe worried those formats would break over time as companies pivoted, got bought, or abandoned old sensors. DNG’s pitch: an open, documented, TIFF-based container that any raw file could be converted into and read decades from now.

Adoption has been lopsided. Leica, Pentax, Ricoh, Hasselblad, and a few phone manufacturers (including modern iPhones and Google Pixels via ProRAW) write DNG directly. Canon, Nikon, Sony, and Fuji refused — they see raw format control as part of their brand. Still, DNG serves as the archival convert-to format for millions of photographers who run their NEF/CR2/ARW libraries through Adobe’s free DNG Converter to future-proof them.

CURIOSITÀ E
ANEDDOTI.

DNG is built on the TIFF/EP specification — a raw TIFF file with strictly documented metadata tags.

Apple's ProRAW (iPhone 12 Pro onward) writes DNG files that combine raw sensor data with computational photography metadata.

Leica, Pentax, Hasselblad, and Ricoh adopted DNG as their primary raw format — saving users from vendor lock-in.

DNG files can embed the original proprietary raw file inside as a backup — a "lossless" conversion that lets you change your mind later.

Adobe provides a free command-line DNG Converter that preserves every pixel of the source raw with zero quality loss.

PUNTI DI FORZA E
LIMITAZIONI.

Punti di forza

Open, documented standard (ISO 12234-2) — future-proof for archival.
Based on TIFF — broad tool support beyond Adobe.
Can embed the original proprietary raw as a safety copy.
Smaller than most proprietary raws thanks to lossless compression.
Stores every Adobe Camera Raw adjustment inline, so edits travel with the file.

Limitazioni

Canon, Nikon, Sony, Fuji still refuse to adopt it.
Some manufacturer-specific features (Fuji film simulations, Nikon Picture Control) are lost in conversion.
Slower workflow — RAW from camera must go through DNG Converter first.
Mobile ProRAW files are heavy (25-75 MB per shot on iPhone).

Dimensioni e pesi tipici

24 MP DNG (lossless compressed)

25-50 MB

Apple ProRAW 48 MP

50-75 MB

Medium-format DNG (50 MP)

60-100 MB

Specifiche tecniche

MIME type: image/x-adobe-dng
Extension: .dng
Container: TIFF/EP (ISO 12234-2)
Standard: Adobe DNG Specification 1.6
Compression: Lossless JPEG, Lossy JPEG XL-like, Uncompressed

CONVERTI DA
DNG

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Casi d'uso comuni

Professional photography, RAW file archival, non-destructive editing.