PEF
Pentax Electronic File (PEF)
PEF is a proprietary RAW image file format used by Pentax digital cameras to store uncompressed or losslessly compressed sensor data.
What is Pentax Electronic File (PEF)?
Developed by Pentax (RICOH), the PEF format captures the maximum amount of light data recorded by the camera's image sensor without applying destructive in-camera processing like JPEG compression. It contains unprocessed metadata, white balance settings, and color profiles, making it ideal for professional post-processing. Because it is a proprietary format, universal support is limited, and users often convert PEF to JPEG using tools like ConvertX for sharing.
Advantages
- Stores uncompressed or losslessly compressed RAW sensor data
- Preserves maximum dynamic range and shadow/highlight details
- Allows non-destructive editing of white balance and exposure
- Higher color depth compared to standard 8-bit JPEG files
Limitations
- Large file sizes consume more storage space
- Requires specialized software or conversion to open and view
- Not natively supported by all web browsers and image viewers
How to open Pentax Electronic File (PEF) files
Pentax Digital Camera Utility
Adobe Photoshop with Camera Raw
Adobe Lightroom
Darktable
RawTherapee
Common use cases
- Professional photography and high-end digital imaging
- Scenarios requiring advanced exposure and color correction
- Archiving original unedited camera captures
- Preparing images for high-resolution printing
PEF converters
Explore other formats
Frequently asked questions
A PEF file is a raw image format generated by Pentax digital single-lens reflex (DSLR) and mirrorless cameras, containing unprocessed sensor data.
You can open PEF files using dedicated photo editing software like Adobe Lightroom, Photoshop, Darktable, or the official Pentax Digital Camera Utility.
Yes, you can easily convert PEF files to standard formats like JPEG using conversion tools such as ConvertX for broader compatibility and sharing.