PEF File Extension

What is PEF file?

PEF files are generated by Pentax digital cameras.

What do PEF files store?

A typical PEF file contains a RAW uncompressed image.

How Pentax cameras save photos?

PEF files store uncompressed RAW images without any additional adjustments made by the Pentax camera software. PEF image are thus saved in an unprocessed format exactly how it was captured by the camera’s sensor.

Why can’t I open a PEF file?

Some applications can have problems with opening some PEF files as the standard is not unified. Various Pentax cameras can save images using a slightly different version of PEF standard. The best solution in such case is to use tools compatible with given Pentax camera model.

Programs which support PEF file extension

Below you will find an index of software programs that can be used to open PEF files divided into 3 categories according to system platform supported. Files with PEF extension, just like any other file formats, can be found on any operating system. The files in question may be transferred to other devices, be it mobile or stationary, yet not all systems may be capable of properly handling such files.

Updated: 03/27/2023

How to open file with PEF extension?

Problems with accessing PEF may be due to various reasons. On the bright side, the most encountered issues pertaining to Pentax Electronic Format files aren’t complex. In most cases they can be addressed swiftly and effectively without assistance from a specialist. The list below will guide you through the process of addressing the encountered problem.

Step 1. Install PaintShop Pro software

The most common reason for such problems is the lack of proper applications that supports PEF files installed on the system. This issue can be addressed by downloading and installing PaintShop Pro or different compatible program, such as Adobe Photoshop, ACDSee, Canvas. On the top of the page a list that contains all programs grouped based on operating systems supported can be found. One of the most risk-free method of downloading software is using links provided by official distributors. Visit PaintShop Pro website and download the installer.

Step 2. Update PaintShop Pro to the latest version

If you already have PaintShop Pro installed on your systems and PEF files are still not opened properly, check if you have the latest version of the software. Software developers may implement support for more modern file formats in updated versions of their products. The reason that PaintShop Pro cannot handle files with PEF may be that the software is outdated. The latest version of PaintShop Pro should support all file formats that where compatible with older versions of the software.

Step 3. Associate Pentax Electronic Format files with PaintShop Pro

If you have the latest version of PaintShop Pro installed and the problem persists, select it as the default program to be used to manage PEF on your device. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

Selecting the first-choice application in Windows

• Clicking the PEF with right mouse button will bring a menu from which you should select the Open with option
• Select Choose another app → More apps
• Finally select Look for another app on this PC, point to the folder where PaintShop Pro is installed, check the Always use this app to open PEF files box and conform your selection by clicking OK button

Selecting the first-choice application in Mac OS

• From the drop-down menu, accessed by clicking the file with PEF extension, select Information
• Proceed to the Open with section. If its closed, click the title to access available options
• Select the appropriate software and save your settings by clicking Change all
• If you followed the previous steps a message should appear: This change will be applied to all files with PEF extension. Next, click the Continue button to finalize the process.

Step 4. Verify that the PEF is not faulty

Should the problem still occur after following steps 1-3, check if the PEF file is valid. Problems with opening the file may arise due to various reasons.

1. Verify that the PEF in question is not infected with a computer virus

If the file is infected, the malware that resides in the PEF file hinders attempts to open it. Immediately scan the file using an antivirus tool or scan the whole system to ensure the whole system is safe. If the PEF file is indeed infected follow the instructions below.

2. Ensure the file with PEF extension is complete and error-free

If you obtained the problematic PEF file from a third party, ask them to supply you with another copy. During the copy process of the file errors may occurred rendering the file incomplete or corrupted. This could be the source of encountered problems with the file. When downloading the file with PEF extension from the internet an error may occurred resulting in incomplete file. Try downloading the file again.

3. Check if the user that you are logged as has administrative privileges.

There is a possibility that the file in question can only be accessed by users with sufficient system privileges. Log out of your current account and log in to an account with sufficient access privileges. Then open the Pentax Electronic Format file.

4. Verify that your device fulfills the requirements to be able to open PaintShop Pro

If the systems has insufficient resources to open PEF files, try closing all currently running applications and try again.

5. Ensure that you have the latest drivers and system updates and patches installed

Regularly updated system, drivers, and programs keep your computer secure. This may also prevent problems with Pentax Electronic Format files. It may be the case that the PEF files work properly with updated software that addresses some system bugs.

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