What is MIME type "image/x-raw-olympus"?

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

This MIME type image/x-raw-olympus is used to handle raw image data from Olympus cameras. It stores sensor details exactly as captured by the camera without processing.

The file is usually saved with the extension ORF. Such files retain high image quality and complete metadata for advanced editing.

Preserves unprocessed sensor details
Maintains camera settings and metadata
Enables high-quality post-processing
Supports professional and archival photography workflows

Software that edits raw images—like Adobe Photoshop or Lightroom—relies on this MIME type to interpret the data correctly.

For more insights on raw image formats, please visit Raw image format on Wikipedia.

Associated file extensions

.orf

Usage Examples

HTTP Header

When serving content with this MIME type, set the Content-Type header:


    Content-Type: image/x-raw-olympus

HTML

In HTML, you can specify the MIME type in various elements:


    <a href="file.dat" type="image/x-raw-olympus">Download file</a>

Server-side (Node.js)

Setting the Content-Type header in Node.js:


    const http = require('http');    
    
    http.createServer((req, res) => {    
      res.setHeader('Content-Type', 'image/x-raw-olympus');    
      res.end('Content here');    
    }).listen(3000);

Associated file extensions

.orf

FAQs

What is the image/x-raw-olympus MIME type used for?

This MIME type specifically identifies Olympus Raw Format (ORF) files, which contain unprocessed image data directly from an Olympus camera's sensor. It allows operating systems and software to distinguish these raw files from standard images like JPEGs.

Can web browsers display image/x-raw-olympus files?

No, standard web browsers (Chrome, Firefox, Safari) cannot render raw image data natively. To display an image captured as an .orf file on a website, you must convert it to a web-compatible format like image/jpeg or image/webp.

How do I configure Apache to serve ORF files correctly?

To ensure your Apache server sends the correct headers for Olympus raw files, add the following line to your .htaccess file or main configuration: AddType image/x-raw-olympus .orf. This helps prevent browsers from misinterpreting the binary data as text.

How do I fix upload errors for ORF files on my website?

If users cannot upload Olympus raw images, check your application's file validation logic. Ensure that image/x-raw-olympus is added to the allowed MIME types list and that the .orf extension is whitelisted in your security settings.

What software opens files with the image/x-raw-olympus type?

These files are best opened with post-processing software like Adobe Lightroom, Photoshop, or Olympus Workspace. While some operating systems can preview them if the correct camera codec pack is installed, dedicated software is required to edit the raw sensor data.

Is image/x-raw-olympus a standard IANA MIME type?

No, the x- prefix indicates that it is a non-standard or vendor-specific subtype. While not officially registered with IANA like image/png, it is the widely accepted convention for identifying Olympus raw files in web headers and email attachments.

General FAQ

What is a MIME type?

A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.

MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.

MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.

How do I find the MIME type for a file?

You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.

Why are multiple MIME types listed for one extension?

Different applications and historical conventions may use alternative MIME identifiers for the same kind of file. Showing them all helps ensure compatibility across systems.