BMP vs ORF
A detailed comparison of BMP Image and Olympus RAW ORF — file size, quality, compatibility, and which format to choose for your workflow.
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Choosing between BMP (BMP Image, image/bmp) and ORF (Olympus RAW ORF, image/x-olympus-orf) depends on your target workflow, compression efficiency, and device support. Below is our side-by-side technical benchmark and instant bidirectional converter.
BMP vs ORF at a glance
BMP vs ORF| Dimension | .BMP | .ORF |
|---|---|---|
| Format Name | BMP Image (.bmp) | Olympus RAW ORF (.orf) |
| Format Family | Raster & Vector Images | Raster & Vector Images |
| Primary MIME | image/bmp | image/x-olympus-orf |
| Developer / Year | Microsoft & IBM (OS/2 + Windows 1.0) (1985) | Olympus (now OM SYSTEM) (2003) |
| Pipeline Role | Read & Write | Source Input |
When should you use BMP vs ORF?
.BMP Use when…
Use BMP (BMP Image) when your pipeline requires native image/bmp compatibility, predictable rendering, or specialized Raster & Vector Images editing support.
.ORF Use when…
Use ORF (Olympus RAW ORF) when you need image/x-olympus-orf delivery, cross-platform Raster & Vector Images distribution, or streamlined storage.
Technical Specifications
| Specification | .BMP | .ORF |
|---|---|---|
| MIME type | image/bmp | image/x-olympus-orf |
| Extensions | .bmp, .dib | — |
| Compression | None (typical); RLE 4/8 bit (rare) | — |
| Color depths | 1, 4, 8, 16, 24, 32 bits per pixel | — |
| Byte order | Little-endian | — |
| Extension | — | .orf |
| Container | — | TIFF/EP with Olympus MakerNote |
| Sensor format | — | Four Thirds / Micro Four Thirds |
| Bit depth | — | 12 or 14-bit |
Strengths Comparison
.BMP Strengths
- Dead-simple format — trivially easy to read and write.
- Lossless and uncompressed — perfect bit-exact pixel storage.
- Universally supported in Windows applications since 1985.
- Supports 1, 4, 8, 16, 24, and 32-bit color depths.
.ORF Strengths
- 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.
Limitations
.BMP — Limitations
- Enormous file sizes — no meaningful compression in typical use.
- Not a web format — browsers support it but nobody serves BMPs over HTTP.
- No metadata support (no EXIF, no ICC profile in practice).
- Multiple header versions mean "a BMP" is ambiguous — parsers must handle several variants.
.ORF — Limitations
- 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.
Technical deep dive: BMP vs ORF
Both BMP and ORF serve distinct roles in modern digital pipelines. With KaijuConverter you can transcode between .bmp and .orf in seconds while preserving metadata and structural fidelity.
Frequently Asked Questions
BMP (BMP Image) uses MIME type image/bmp in the Raster & Vector Images family, whereas ORF (Olympus RAW ORF) uses image/x-olympus-orf in the Raster & Vector Images family. Each optimizes for different trade-offs in file size, fidelity, and software compatibility.
Yes. KaijuConverter uses tuned encoding profiles to preserve maximum visual, audio, or document fidelity when converting between BMP and ORF.
BMP (Bitmap) is a raster image format developed by Microsoft for Windows. It stores images with no compression by default, resulting in large file sizes but pixel-perfect quality. It has been part of Windows since version 1.0.
ORF (Olympus RAW ORF) is an image format used to store raster graphics — a two-dimensional grid of pixels describing a picture. It is part of the raster & vector images family and designed around a specific trade-off between file size, visual fidelity, and feature support (transparency, colour depth, compression type). Photographers, web designers, and content creators choose ORF when its particular strengths match the publishing target.
BMP files open in Windows Paint, Photos, macOS Preview, GIMP, Photoshop, and virtually any image viewer. All Windows applications support BMP natively.
Most desktop photo viewers (Windows Photos, macOS Preview, GIMP, Photoshop, Affinity Photo) open ORF natively. On mobile, iOS Photos and Google Photos display ORF in the gallery when supported by the OS. If the format is rare or new, convert to JPG or PNG first — both are universally readable — using our ORF to JPG or ORF to PNG converter.
PNG is better than BMP in almost every scenario since it provides lossless compression (smaller files), transparency support, and wider cross-platform use. BMP is mainly relevant for legacy Windows applications.
Yes. Every .bmp file uploaded to KaijuConverter is transferred over TLS 1.3, processed in an isolated container with SHA-256 verification, and automatically deleted within 30–60 minutes (or immediately with 1 click).
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