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

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

The MIME type image/x-raw-hasselblad identifies raw files produced by Hasselblad cameras. It holds unprocessed sensor data and important metadata. This keeps the image details intact for later editing.
Images in this format are not compressed like standard JPEGs. They give photographers more flexibility during post-processing.
The file that uses this format carries the extension 3FR.

Professional Editing: Retains maximum detail for precise exposure, color, and contrast adjustments.
Archival Quality: Preserves all original sensor data for long-term storage and future revisions.
Software Compatibility: Supported by dedicated raw processing applications and Hasselblad’s own editing tools.

For more technical insights and file details, visit Filext.

Associated file extensions

.3fr

Usage Examples

HTTP Header

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


    Content-Type: image/x-raw-hasselblad

HTML

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


    <a href="file.dat" type="image/x-raw-hasselblad">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-hasselblad');    
      res.end('Content here');    
    }).listen(3000);

Associated file extensions

.3fr

FAQs

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

This MIME type is used to identify proprietary RAW image files generated by Hasselblad cameras, typically with the .3fr extension. It indicates that the file contains unprocessed sensor data intended for professional post-production rather than direct display.

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

No, modern web browsers like Chrome, Firefox, and Safari do not support displaying RAW camera formats natively. To show these images on the web, you must convert them to standard formats like image/jpeg or image/webp.

How do I configure Apache to serve .3fr files correctly?

To ensure your Apache server sends the correct Content-Type header, add the following line to your .htaccess file or global configuration: AddType image/x-raw-hasselblad .3fr.

Which software can open files with this MIME type?

Files identified as image/x-raw-hasselblad are best opened with Hasselblad's own Phocus software. They are also widely supported by professional editing suites like Adobe Lightroom and Adobe Photoshop (via Camera Raw).

What does the 'x-' prefix mean in image/x-raw-hasselblad?

The x- prefix indicates that the MIME type is non-standard or proprietary. It is not part of the core IANA registry but is widely accepted by applications to identify specific vendor formats like Hasselblad's 3FR files.

How do I add this MIME type to Nginx?

You can enable support in Nginx by editing the mime.types file (usually in /etc/nginx/). Add the line image/x-raw-hasselblad 3fr; inside the types block and reload the server.

Why are image/x-raw-hasselblad files larger than JPEGs?

These files contain uncompressed, high-bit-depth sensor data necessary for professional color grading and exposure correction. Unlike JPEGs, they do not discard data to save space, resulting in much larger file sizes.

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.