Sobre os arquivos ORF
Olympus RAW ORF
Formato RAW proprietário das câmeras Olympus/OM System (E-M1, OM-1). Preserva máxima qualidade do sensor para edição profissional. Exige software específico.
Família
Raster & Vector Images
Extensão
.orf
Tipo MIME
image/x-olympus-orf
Pode ser usado como
COMO NASCEU O
FORMATO ORF.
ORF — Olympus Raw Format — shipped with the Olympus E-1 in 2003, the first 4/3 Four Thirds system camera. Olympus pioneered the Micro Four Thirds mirrorless standard with Panasonic in 2008, and ORF remained the raw format across both mounts. In 2020 Olympus sold its imaging business to Japan Industrial Partners, who relaunched under the OM SYSTEM brand; ORF continues unchanged.
ORF is a TIFF variant with Olympus makernotes — nothing architecturally exotic. What made Olympus distinctive was computational in-body features baked into the format: Live Composite long exposure, Pro Capture pre-burst buffering, Hand-Held High Res (16-shot pixel shift), and Live ND simulation. Many of those show up as metadata flags or multi-frame containers inside the ORF.
CURIOSIDADES E
FATOS INTERESSANTES.
Olympus's "Live Composite" mode stores a long-exposure stack as a single ORF — typically 30+ minutes of astrophotography in one file.
The OM-1's "Hand-Held High Res" feature creates 50 MP or 80 MP composite ORFs from 16 rapid captures — no tripod needed.
When Olympus exited the camera business in 2020, the ORF format transferred intact to OM Digital Solutions (OM SYSTEM).
ORF files from Four Thirds cameras (2003-2008) use a 4/3 aspect ratio sensor — the crop factor is 2× vs full-frame.
Olympus's flagship bodies shoot at 14-bit ORF but store data in a compact 12-bit lossy variant by default to save card space.
VANTAGENS E
LIMITAÇÕES.
Vantagens
- Compact files relative to sensor size (Four Thirds is smaller than APS-C).
- Computational photography features (Live Composite, Pro Capture) baked into format.
- Stable across 20+ years of Olympus/OM SYSTEM bodies.
- In-body stabilization means ORF handheld shots rival tripod work.
Limitações
- Smaller sensor means less dynamic range than full-frame raws.
- Lossy compressed ORF is the default — hidden quality loss.
- Market share is small; fewer tutorials and fewer Lightroom profiles.
- Proprietary with no official spec.
Tamanhos típicos de arquivo
20 MP ORF (OM-1, E-M1 III)
18-25 MB
50 MP Hand-Held High Res composite
60-80 MB
80 MP Tripod High Res ORF
100-140 MB
Especificações técnicas
- MIME type
- image/x-olympus-orf
- Extension
- .orf
- Container
- TIFF/EP with Olympus MakerNote
- Sensor format
- Four Thirds / Micro Four Thirds
- Bit depth
- 12 or 14-bit
CONVERTER A PARTIR DE
ORF
Casos de uso comuns
Olympus photography
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Comparativos populares
ORF vs PNG
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ORF vs WEBP
Diferenças, tamanho de arquivo e quando escolher cada formato.
ORF vs AVIF
Diferenças, tamanho de arquivo e quando escolher cada formato.
ORF vs GIF
Diferenças, tamanho de arquivo e quando escolher cada formato.
ORF vs BMP
Diferenças, tamanho de arquivo e quando escolher cada formato.
ORF vs TIFF
Diferenças, tamanho de arquivo e quando escolher cada formato.
Conversões populares de ORF
Os destinos mais procurados ao converter arquivos ORF.
Perguntas frequentes sobre ORF
Perguntas frequentes
ORF (Olympus RAW ORF) is an image formato used to store raster graphics — a two-dimensional grid of pixels describing a picture. It is part of the raster & vector images family e designed around a specific trade-off between tamanho do arquivo, visual fidelity, e feature support (transparency, colour depth, compressão type). Photographers, web designers, e content creators choose ORF when its particular strengths match the publishing target.
Most desktop photo viewers (Windows Photos, macOS Preview, GIMP, Photoshop, Affinity Photo) abrir ORF natively. On mobile, iOS Photos e Google Photos display ORF no gallery when suportado por the OS. If the formato is rare ou new, converter to JPG ou PNG first — both are universally readable — usando our ORF to JPG ou ORF to PNG converter.
Upload the ORF to KaijuConverter e pick a target formato (JPG, PNG, WebP, HEIC, TIFF, BMP, SVG, PDF). The conversion runs in o navegador via ImageMagick e returns a baixar in seconds. No account ou installation required; both input e output delete automatically within two hours.
Depende de the task. JPG is the smallest tamanho do arquivo para photographs; PNG is sem perdas com transparência; ORF has its own niche that may favour colour depth, animation, ou codificação efficiency over one ou both of those. para the final web publish, test all three e measure tamanho do arquivo plus visible quality on real content.