What Is an ORF File?

How to Open, Edit, and Convert ORF Files

ORF Files
ORF Files.

A file with the ORF file extension is an Olympus Raw Image file that stores unprocessed image data from Olympus digital cameras. They aren't intended to be viewed in this raw form but instead edited and processed into a more common format like TIFF or JPEG.

Photographers use the ORF file to develop an image through processing software, adjusting things like the exposure, contrast, and white balance.

However, if the camera shoots in the "RAW+JPEG" mode, it will make both an ORF file and JPEG version so that it can be easily viewed, printed, etc.

For comparison, an ORF file contains 12, 14, or more bits per pixel per channel of the image, whereas JPEG only has 8.

Note: ORF is also the name of a spam filter for Microsoft Exchange Server, developed by Vamsoft. However, it has nothing to do with this file format and will not open or convert the ORF file.

How to Open an ORF File

Your best bet for opening ORF files is to use Olympus Viewer, a free program from Olympus that's available to owners of their cameras. It works on both Windows and Mac.

Note: You have to enter the device's serial number on the download page before you can get Olympus Viewer. There's an image on the download page that shows how to find that number on your camera.

Olympus Master works too but was shipped with cameras up until 2009, so it only works with ORF files that were made with those specific cameras.

Olympus ib is a similar program that replaced Olympus Master; it works with not only older ones but also newer Olympus digital cameras.

Another Olympus software that opens ORF pictures is Olympus Studio, but only for E-1 to E-5 cameras. You can request a copy by emailing Olympus.

ORF files can also be opened without Olympus software, like with Able RAWer, Adobe Photoshop, Corel AfterShot, and probably other popular photo and graphics tools.

The default photo viewer in Windows should be able to open ORF files too, but it might require the Microsoft Camera Codec Pack.

Note: Since there are multiple programs that can open ORF files, you might end up having more than one on your computer. If you find that the ORF file opens with a program that you'd rather not use it with, you can easily change the default program that opens ORF files.

How to Convert an ORF File

Download Olympus Viewer for free if you need to convert the ORF file to JPEG or TIFF.

You can also convert an ORF file online using a website like Zamzar, which supports saving the file to JPG, PNG, TGA, TIFF, BMP, AI, and other formats.

You can use Adobe's DNG Converter for Windows or for Mac to convert ORF to DNG.

Still Can't Get Your File to Open?

The first thing you should do if your file isn't opening with the programs mentioned above is to double-check the file extension. Some file formats use a file extension that's very similar to "ORF" but that doesn't mean that they have anything in common or that they can work with the same software programs.

For example, OFR files could easily be confused with ORF pictures, but they're actually OptimFRONG Audio files that only work with a few audio related programs like Winamp (with the OptimFROG plugin).

Your file might instead be an ORA file or even a RadiantOne VDS Database Schema file with the ORX file extension, which opens with RadiantOne FID.

An ORF Report file might sound like it has something to do with the ORF image file but it does not. ORF Report files end in the PPR file extension and are created by the Vamsoft ORF spam filter.

In all of these cases, and likely many others, the file has nothing to do with ORF images used by Olympus cameras. Check that the file extension truly reads ".ORF" at the end of the file. Chances are that if you can't open it with one of the image viewers or converters mentioned above, you're not actually dealing with an Olympus Raw Image file.