Olympus ORF

ORF, or Olympus RAW, is a raw image format produced by Olympus digital cameras.

Format
The format is TIFF-like, but with a different file signature. The full-size image is in the first IFD. There is also Exif data, with a MakerNote.

Identification
Files begin with signature bytes  ("IIRO"),   ("MMOR"), or   ("IIRS").

Software

 * Refer to Cameras and Digital Image Sensors: Software

Sample files

 * RAW-Samples: Olympus
 * http://digikam3rdparty.free.fr/TEST_IMAGES/RAW/ → .../*.orf
 * Olympus OM-D E-M1 Photos → Olympus OM-D E-M1 RAW Images
 * Olympus OM-D E-M5 Review → Sample RAW Images
 * https://telparia.com/fileFormatSamples/image/orf/
 * Sample files from C-5050

Links

 * Wikipedia article
 * libopenraw wiki: Olympus ORF
 * ExifTool: Olympus Tags