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

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

image/x-raw-pentax is a MIME type for unprocessed image data from Pentax cameras. It marks files that hold the sensor’s raw output with minimal in-camera processing.

This format is used when you need the complete image information for fine-tuning in editing software. It keeps details like exposure, color, and brightness untouched for maximum control in post-processing.

Main use: To safely store and process unaltered images from a Pentax camera.
Editing: Enables adjustments like white balance and contrast in photo editors.
Archiving: Preserves maximum detail for future edits and high-quality prints.

Files linked with this MIME type include raw images in formats such as PTX and PEF.

For further reading, visit external resources on raw image formats on sites like Wikipedia.

Associated file extensions

.ptx, .pef

Usage Examples

HTTP Header

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


    Content-Type: image/x-raw-pentax

HTML

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


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

Associated file extensions

.ptx, .pef

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.