Olympus and OM System ORF to JPG
ORF is the raw format of Olympus and its successor OM System. The files are small and easy to work with, but Micro Four Thirds has a few habits worth knowing before you export.
If your camera says Olympus or OM System on the front, its raw files end in .ORF. Olympus used the format across its Four Thirds DSLRs (the E-series), the PEN line and the OM-D bodies such as the E-M1, E-M5 and E-M10. When Olympus transferred its imaging business to the new company OM Digital Solutions, which began operating in 2021, the new OM System cameras, including the OM-1, OM-1 Mark II and OM-5, kept the same .ORF extension. One converter handles both brand names.
Nearly all of these cameras use the Micro Four Thirds (or older Four Thirds) sensor size, about a quarter of the area of a full-frame sensor. That one fact explains most of the advice below: files are compact, lenses are small and often depend on software correction, and noise appears at lower ISO values than on larger sensors.
Quick conversion
- Open RAWSnap and select your .ORF files. Processing happens in your browser; nothing is uploaded.
- Start from the Natural preset and judge exposure first.
- Adjust, then save a 2048 px JPEG for sharing or a full-resolution JPEG for printing. Several files can be exported together as a ZIP.
What is, and isn't, in an ORF file
An ORF holds the sensor data (typically 12-bit) plus a small processed JPEG preview and the camera's settings. Your camera's look is not part of the raw data. Picture Modes (i-Enhance, Vivid, Natural, Muted, Portrait, Monotone), Art Filters, the Color Creator, and the Color and Monochrome Profile Control on bodies such as the PEN-F are recorded as instructions that only Olympus and OM System software interpret. A third-party developer, RAWSnap included, shows the neutral development instead. People are often surprised that a shot taken with the grainy black-and-white Art Filter opens in full color: that is expected, and it is actually the benefit of raw. You can still choose the look afterward.
To get close to common in-camera looks with RAWSnap sliders:
| In-camera look | Starting point in RAWSnap |
|---|---|
| Natural | Natural preset, Contrast +5 |
| Vivid / i-Enhance style punch | Vivid preset, or Vibrance +20, Contrast +10, Clarity +8 |
| Muted | Contrast -10, Saturation -15 |
| Monotone | B&W preset; B&W Bold for a harder, grainier-feeling print look |
| Warm, nostalgic color | Vintage or Warm Film preset |
When a combination works, store it as a custom preset, and every future batch can start from it. See using presets for a workflow.
Tips that matter on Micro Four Thirds
Expose to protect highlights, then lift shadows carefully
Smaller sensors have less headroom overall, and shadow noise shows up sooner when you brighten. The practical balance is to avoid clipping the brightest important area and then pull up shadows moderately. In RAWSnap, Highlights at -30 to -60 brings back skies and bright walls, while Shadows above roughly +50 on a high-ISO file will reveal grain. The highlight and shadow recovery guide walks through the order of operations.
Noise above ISO 1600
Modern bodies such as the OM-1 handle noise better than early PEN models, but noise at ISO 3200 and up is still visible at 100% view. RAWSnap does not have a noise reduction slider, so a few habits help. Keep Clarity at zero or below on noisy files, because clarity accentuates grain. Prefer the phone export: downsizing to 2048 px averages out much of the visible noise. For important low-light frames, OM Workspace or an editor with modern noise reduction will do better. Our high-ISO noise guide has more detail.
Lens distortion and vignetting
Many Micro Four Thirds lenses, especially compact kit zooms and some wide primes, are designed with software correction in mind. The camera and OM Workspace apply the correction automatically using data stored in the file, but generic raw developers that skip lens profiles will show the uncorrected image: noticeable barrel distortion at the wide end and darker corners. RAWSnap does not apply lens corrections. For portraits, food and most everyday scenes it rarely matters. For architecture or straight horizons near the frame edge, use an editor with lens profile support.
White balance under artificial light
Olympus and OM System cameras offer an auto white balance option that keeps some warm color under tungsten light. That choice is stored as the as-shot white balance, which RAWSnap uses as its starting point, so indoor shots may open warmer than you expect. Pull Temp toward the negative side until whites look neutral, then nudge back a little if you want to keep some ambience. The white balance guide explains a quick neutral-reference method.
High Res Shot, Live Composite and other special modes
Several OM-D and OM System bodies have a High Res Shot mode that combines multiple sensor-shifted exposures into one much larger file, in tripod and handheld versions. These raw files are several times the size of a normal ORF. Support for these composite files in third-party decoders has historically lagged behind normal ORFs, and they also take far more memory to develop in a browser. If a High Res Shot file fails to open or is slow, OM Workspace is the most reliable tool for it, and a desktop browser with plenty of free memory gives RAWSnap the best chance.
Other computational features, such as Live ND, focus stacking and Live Composite, are processed in the camera. Depending on the mode and the body, you may get only a JPEG or a raw file containing the combined result; check your camera manual. What you cannot do is redo the combination later in a generic developer.
OM Workspace or a browser converter?
OM Workspace (formerly Olympus Workspace) is the free official software for these cameras. Use it when you want the exact Picture Mode or Art Filter look, need lens corrections applied automatically, or are processing High Res Shot files. It is a desktop install for Windows and macOS.
A browser converter makes sense when you are on a computer without your editing software, when you want to batch-export quick JPEGs from a day of shooting without importing them into a catalog, or when you simply prefer not to install anything. Because RAWSnap runs locally, it is also usable on work or borrowed computers without copying photos to a server. For a wider look at the options, see raw editors compared.
Troubleshooting
- Brand-new camera won't open: raw decoders need an update for each new model. Very recent OM System bodies may not be supported by every tool on release day. Use OM Workspace until third-party support catches up.
- Colors look flat compared to the camera JPEG: normal. The camera JPEG has a picture mode and contrast curve applied. See why raw looks flat.
- Black-and-white shot opens in color: Monotone and Art Filters are not stored in the raw data. Apply B&W or B&W Bold.
- Square or 4:3 crop not applied: aspect ratio settings are metadata, and the raw usually contains the full 4:3 sensor area. RAWSnap offers fixed 1:1, 4:5, 3:4, 9:16 and 16:9 crops; for any other shape, crop the exported JPEG.
FAQ
Are OM System files different from Olympus ORF files?
They use the same .ORF extension and general structure. Newer models simply need a decoder version that knows about them.
Why is my exported JPEG smaller than the camera's maximum resolution?
"Save for phone" resizes to 2048 px on the long edge. Use "Save full quality" for the full sensor resolution.
Can I recover Art Filter effects from the raw file?
Not in RAWSnap. Art Filters are applied in the camera JPEG and in OM Workspace. You can approximate many of them with presets and sliders, but not reproduce them exactly.
Should I shoot RAW+JPEG on an OM System camera?
It is a good habit if you like a particular Picture Mode or Art Filter. The JPEG keeps that look exactly, and the ORF gives you a clean starting point when exposure or white balance needs fixing.
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